{"id":16867,"date":"2020-03-28T00:13:25","date_gmt":"2020-03-27T17:13:25","guid":{"rendered":"https:\/\/kiencang.net\/?p=15504"},"modified":"2023-04-15T16:13:47","modified_gmt":"2023-04-15T09:13:47","slug":"youtube-tai-nang-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/","title":{"rendered":"YouTube t\u1ea3i n\u1eb7ng nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"\n<p>Trong b\u00e0i vi\u1ebft <a href=\"https:\/\/kiencang.net\/tang-toc-video-youtube-wordpress\/\">t\u0103ng t\u1ed1c video YouTube nh\u00fang trong WordPress<\/a>, ch\u00fang ta \u0111\u00e3 bi\u1ebft YouTube t\u1ea3i n\u1eb7ng nh\u01b0 th\u1ebf n\u00e0o r\u1ed3i, nh\u01b0ng \u0111\u00f3 ch\u1ec9 l\u00e0 m\u00f4 t\u1ea3 t\u1ed5ng quan m\u00e0 th\u00f4i. Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd \u0111i v\u00e0o chi ti\u1ebft, \u0111\u1ec3 bi\u1ebft c\u1ee5 th\u1ec3 YouTube t\u1ea3i v\u1ec1 nh\u1eefng file g\u00ec, d\u00f9ng l\u00e0m g\u00ec v\u00e0 n\u00f3 n\u1eb7ng bao nhi\u00eau (t\u00ednh theo KB).<\/p>\n\n\n\n<p>C\u00e1ch th\u1eed nghi\u1ec7m l\u00e0 t\u00f4i t\u1ea1o m\u1ed9t trang HTML \u0111\u01a1n gi\u1ea3n, v\u00e0 trong trang \u0111\u00f3 t\u00f4i ch\u1ec9 nh\u00fang video YouTube, nh\u1edd v\u1eady c\u00f4ng vi\u1ec7c ki\u1ec3m tra s\u1ebd \u0111\u01a1n gi\u1ea3n h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi vi\u1ec7c ki\u1ec3m tra tr\u00ean trang th\u00f4ng th\u01b0\u1eddng (c\u00e1i s\u1ebd l\u1eabn l\u1ed9n \u0111\u1ee7 th\u1ee9 file t\u1eeb c\u00e1c ngu\u1ed3n kh\u00e1c nhau ch\u1ee9 kh\u00f4ng c\u00f2n ch\u1ec9 ri\u00eang YouTube n\u1eefa).<\/p>\n\n\n\n<p>Trang demo ch\u1ec9 nh\u00fang YouTube \u0111\u1eb7t \u1edf li\u00ean k\u1ebft n\u00e0y:  <a href=\"https:\/\/static.kiencang.net\/2020\/video-nhung-youtube.html\">https:\/\/static.kiencang.net\/2020\/video-nhung-youtube.html<\/a> <\/p>\n\n\n\n<p>T\u00f4i <a href=\"https:\/\/kiencang.net\/huong-dan-su-dung-pingdom\/\">s\u1eed d\u1ee5ng Tools Pingdom \u0111\u1ec3 ki\u1ec3m tra<\/a> c\u00e1c th\u00e0nh ph\u1ea7n t\u1ea3i v\u1ec1, \u0111\u00e2y l\u00e0 c\u00f4ng c\u1ee5 c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t \u0111i k\u00e8m giao di\u1ec7n tr\u1ef1c quan r\u1ea5t d\u1ec5 hi\u1ec3u. Ngo\u00e0i ra b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng c\u00f4ng c\u1ee5 d\u00e0nh cho nh\u00e0 ph\u00e1t tri\u1ec3n t\u00edch h\u1ee3p s\u1eb5n trong tr\u00ecnh duy\u1ec7t Chrome \u0111\u1ec3 test (<em>Ctrl + Shift + I &gt; Network &gt; Disable cache<\/em>).<\/p>\n\n\n\n<p>\u0110\u1ea7u ti\u00ean, t\u00f4i gi\u1ea3 l\u1eadp truy c\u1eadp t\u1eeb khu v\u1ef1c ch\u00e2u \u00c1, m\u00e0 c\u1ee5 th\u1ec3 \u1edf \u0111\u00e2y l\u00e0 Nh\u1eadt B\u1ea3n:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/kiem-tra-tu-japan.png\" alt=\"ki\u1ec3m tra t\u1eeb khu v\u1ef1c ch\u00e2u \u00c1\" class=\"wp-image-15507\"\/><\/figure>\n\n\n\n<p>K\u1ebft qu\u1ea3 nh\u01b0 sau:<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_60 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\" role=\"button\"><label for=\"item-6577d73e1a368\" ><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input aria-label=\"Toggle\" aria-label=\"item-6577d73e1a368\"  type=\"checkbox\" id=\"item-6577d73e1a368\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#A_Phan_loai_theo_dung_luong_cua_cac_kieu_file\" title=\"A. Ph\u00e2n lo\u1ea1i theo dung l\u01b0\u1ee3ng c\u1ee7a c\u00e1c ki\u1ec3u file\">A. Ph\u00e2n lo\u1ea1i theo dung l\u01b0\u1ee3ng c\u1ee7a c\u00e1c ki\u1ec3u file<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#B_Phan_loai_theo_so_luong_request_cua_cac_kieu_file\" title=\"B. Ph\u00e2n lo\u1ea1i theo s\u1ed1 l\u01b0\u1ee3ng request c\u1ee7a c\u00e1c ki\u1ec3u file\">B. Ph\u00e2n lo\u1ea1i theo s\u1ed1 l\u01b0\u1ee3ng request c\u1ee7a c\u00e1c ki\u1ec3u file<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#C_Kich_co_du_lieu_theo_ten_mien\" title=\"C. K\u00edch c\u1ee1 d\u1eef li\u1ec7u theo t\u00ean mi\u1ec1n\">C. K\u00edch c\u1ee1 d\u1eef li\u1ec7u theo t\u00ean mi\u1ec1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#D_So_luong_request_theo_ten_mien_cu_the\" title=\"D. S\u1ed1 l\u01b0\u1ee3ng request theo t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3\">D. S\u1ed1 l\u01b0\u1ee3ng request theo t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#E_Ten_file_cu_the_va_muc_dich_cua_no\" title=\"E. T\u00ean file c\u1ee5 th\u1ec3 v\u00e0 m\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3\">E. T\u00ean file c\u1ee5 th\u1ec3 v\u00e0 m\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#Ket_luan\" title=\"K\u1ebft lu\u1eadn\">K\u1ebft lu\u1eadn<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/#Bonus\" title=\"Bonus\">Bonus<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_Phan_loai_theo_dung_luong_cua_cac_kieu_file\"><\/span>A. Ph\u00e2n lo\u1ea1i theo dung l\u01b0\u1ee3ng c\u1ee7a c\u00e1c ki\u1ec3u file<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/tinh-theo-dung-luong.png\" alt=\"t\u00ednh theo dung l\u01b0\u1ee3ng t\u1eebng file\" class=\"wp-image-15508\"\/><\/figure><\/div>\n\n\n<p>B\u1ea1n t\u1eadp trung v\u00e0o 5 m\u1ee5c ch\u00ednh, c\u00f3 th\u1ec3 th\u1ea5y ngay YouTube ch\u1ee7 y\u1ebfu t\u1ea3i v\u1ec1:<\/p>\n\n\n\n<ol>\n<li>JavaScript v\u1edbi h\u01a1n 500 KB<\/li>\n\n\n\n<li>Font v\u1edbi h\u01a1n 50 KB<\/li>\n\n\n\n<li>CSS v\u1edbi h\u01a1n 40 KB<\/li>\n\n\n\n<li>\u1ea2nh v\u1edbi g\u1ea7n 40 KB<\/li>\n\n\n\n<li>XHR v\u1edbi h\u01a1n 3 KB<\/li>\n<\/ol>\n\n\n\n<p>T\u1ed5ng c\u1ed9ng YouTube t\u1ea3i kho\u1ea3ng 630 KB d\u1eef li\u1ec7u v\u1ec1, trong \u0111\u00f3 ch\u1ee7 y\u1ebfu l\u00e0 JavaScript. T\u1ea5t c\u1ea3 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 <a href=\"https:\/\/kiencang.net\/tai-nguyen-ben-thu-ba-wordpress\/\">t\u00e0i nguy\u00ean c\u1ee7a b\u00ean th\u1ee9 ba<\/a>. Ri\u00eang c\u00e1i HTML l\u00e0 c\u1ee7a trang, kh\u00f4ng ph\u1ea3i c\u1ee7a YouTube, n\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh v\u00e0o \u0111\u00e2y.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"B_Phan_loai_theo_so_luong_request_cua_cac_kieu_file\"><\/span>B. Ph\u00e2n lo\u1ea1i theo s\u1ed1 l\u01b0\u1ee3ng request c\u1ee7a c\u00e1c ki\u1ec3u file<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/so-luong-request.png\" alt=\"s\u1ed1 l\u01b0\u1ee3ng request c\u1ee7a ki\u1ec3u file\" class=\"wp-image-15509\"\/><\/figure><\/div>\n\n\n<p>\u1ede \u0111\u00e2y ch\u00fang ta th\u1ea5y nh\u01b0 sau:<\/p>\n\n\n\n<ol>\n<li>S\u1ed1 l\u01b0\u1ee3ng request JavaScript l\u00e0 5<\/li>\n\n\n\n<li>S\u1ed1 l\u01b0\u1ee3ng request font l\u00e0 4<\/li>\n\n\n\n<li>S\u1ed1 l\u01b0\u1ee3ng request XHR l\u00e0 2<\/li>\n\n\n\n<li>S\u1ed1 l\u01b0\u1ee3ng request \u1ea3nh l\u00e0 2<\/li>\n\n\n\n<li>S\u1ed1 l\u01b0\u1ee3ng request CSS l\u00e0 1<\/li>\n<\/ol>\n\n\n\n<p>JavaScript v\u1eabn chi\u1ebfm s\u1ed1 l\u01b0\u1ee3ng request nhi\u1ec1u nh\u1ea5t, nh\u01b0ng qu\u1ea3 l\u00e0 kh\u00f3 hi\u1ec3u khi YouTube c\u1ea7n \u0111\u1ebfn 4 request d\u00e0nh cho <a href=\"https:\/\/kiencang.net\/font-tuy-chinh\/\">font t\u00f9y ch\u1ec9nh<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Kich_co_du_lieu_theo_ten_mien\"><\/span>C. K\u00edch c\u1ee1 d\u1eef li\u1ec7u theo t\u00ean mi\u1ec1n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/kich-co-theo-ten-mien.png\" alt=\"k\u00edch c\u1ee1 theo t\u00ean mi\u1ec1n\" class=\"wp-image-15510\"\/><\/figure><\/div>\n\n\n<p>\u1ede \u0111\u00e2y ch\u00fang ta th\u1ea5y video YouTube g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn c\u00e1c t\u00ean mi\u1ec1n v\u1edbi k\u00edch c\u1ee1 nh\u01b0 sau:<\/p>\n\n\n\n<ol>\n<li>YouTube.com v\u1edbi h\u01a1n 550 KB d\u1eef li\u1ec7u (c\u00e1c file JavaScript v\u00e0 CSS \u0111\u01b0\u1ee3c t\u1ea3i t\u1eeb m\u00e1y ch\u1ee7 g\u1ed1c c\u1ee7a YouTube)<\/li>\n\n\n\n<li>fonts.gstatic.com v\u1edbi g\u1ea7n 50 KB d\u1eef li\u1ec7u (font Roboto cho video) <\/li>\n\n\n\n<li>i.ytimg.com v\u1edbi h\u01a1n 30 KB d\u1eef li\u1ec7u (\u1ea3nh \u0111\u1ea1i di\u1ec7n video)<\/li>\n\n\n\n<li>yt3.ggpht.com v\u1edbi 4,1 KB d\u1eef li\u1ec7u (\u1ea3nh \u0111\u1ea1i di\u1ec7n k\u00eanh)<\/li>\n\n\n\n<li>googleads.g.doubleclick.net v\u1edbi ch\u01b0a \u0111\u1ea7y 0,5 KB d\u1eef li\u1ec7u (qu\u1ea3ng c\u00e1o tr\u00ean video n\u1ebfu c\u00f3)<\/li>\n\n\n\n<li>static.doubleclick.net v\u1edbi ch\u01b0a \u0111\u1ea7y 0,5 KB d\u1eef li\u1ec7u (qu\u1ea3ng c\u00e1o tr\u00ean video n\u1ebfu c\u00f3)<\/li>\n<\/ol>\n\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng th\u00f4ng tin tr\u00ean \u0111\u1ec3 <a href=\"https:\/\/kiencang.net\/preconnect-youtube\/\">th\u1ef1c hi\u1ec7n preconnect (k\u1ebft n\u1ed1i s\u1edbm) v\u1edbi c\u00e1c t\u00ean mi\u1ec1n nh\u1eb1m c\u1ea3i thi\u1ec7n \u00edt nhi\u1ec1u t\u1ed1c \u0111\u1ed9 trang<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"D_So_luong_request_theo_ten_mien_cu_the\"><\/span>D. S\u1ed1 l\u01b0\u1ee3ng request theo t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/request-theo-ten-mien.png\" alt=\"s\u1ed1 l\u01b0\u1ee3ng request theo t\u00ean mi\u1ec1n\" class=\"wp-image-15511\"\/><\/figure><\/div>\n\n\n<p>\u1ede \u0111\u00e2y ch\u00fang ta th\u1ea5y:<\/p>\n\n\n\n<ol>\n<li>youtube.com v\u1edbi 6 request<\/li>\n\n\n\n<li>fonts.gstatic.com v\u1edbi 4 request<\/li>\n\n\n\n<li>i.ytimg.com v\u1edbi 1 request (m\u1ed9t \u1ea3nh)<\/li>\n\n\n\n<li>yt3.ggpht.com v\u1edbi 1 request (m\u1ed9t \u1ea3nh)<\/li>\n\n\n\n<li>googleads.g.doubleclick.net v\u1edbi 3 request<\/li>\n\n\n\n<li>static.doubleclick.net v\u1edbi 1 request<\/li>\n<\/ol>\n\n\n\n<p>Khi t\u00f4i ki\u1ec3m tra l\u1ea1i t\u1eeb c\u00f9ng m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m th\u00ec th\u1ea5y k\u1ebft qu\u1ea3 kh\u00f4ng thay \u0111\u1ed5i. Tuy nhi\u00ean khi t\u00f4i th\u1eed chuy\u1ec3n sang \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c, k\u1ebft qu\u1ea3 l\u1ea1i thay \u0111\u1ed5i r\u1ea5t nhi\u1ec1u v\u1ec1 m\u1eb7t dung l\u01b0\u1ee3ng t\u1ea3i v\u1ec1, ch\u1eb3ng h\u1ea1n v\u1eabn trang tr\u00ean nh\u01b0ng \u0111\u1ecba \u0111i\u1ec3m ch\u1ecdn l\u00e0 Hoa K\u1ef3 (th\u1ee7 \u0111\u00f4 Washington), k\u1ebft qu\u1ea3 s\u1ebd nh\u01b0 sau:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/tai-tu-washington.png\" alt=\"\" class=\"wp-image-15512\"\/><\/figure><\/div>\n\n\n<p>Thay \u0111\u1ed5i t\u1eadp trung \u1edf ph\u1ea7n script, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t d\u1eef li\u1ec7u n\u1eb1m \u1edf t\u00ean mi\u1ec1n YouTube.com:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/kkhac-biet-o-YouTube.png\" alt=\"\" class=\"wp-image-15513\"\/><\/figure><\/div>\n\n\n<p>Th\u00fa v\u1ecb l\u00e0, ngo\u1ea1i tr\u1eeb Washington, c\u00e1c \u0111\u1ecba \u0111i\u1ec3m kh\u00e1c kh\u00f4ng thay \u0111\u1ed5i l\u01b0\u1ee3ng d\u1eef li\u1ec7u t\u1ea3i v\u1ec1 (ho\u1eb7c ch\u1ec9 r\u1ea5t \u00edt), t\u00f4i hi\u1ec7n kh\u00f4ng r\u00f5 v\u00ec sao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"E_Ten_file_cu_the_va_muc_dich_cua_no\"><\/span>E. T\u00ean file c\u1ee5 th\u1ec3 v\u00e0 m\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u1ede ngay b\u00ean d\u01b0\u1edbi l\u00e0 <a href=\"https:\/\/kiencang.net\/waterfall-toc-do-website\/\">b\u1ea3ng waterfall<\/a> \u0111\u1ec3 b\u1ea1n bi\u1ebft c\u1ee5 th\u1ec3 c\u00e1c file t\u1ea3i v\u1ec1, th\u1eddi \u0111i\u1ec3m ch\u00fang b\u1eaft \u0111\u1ea7u t\u1ea3i, c\u0169ng nh\u01b0 kho\u1ea3ng th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 ho\u00e0n t\u1ea5t t\u1ea3i.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/waterfall-youtube-1024x591.png\" alt=\"\" class=\"wp-image-15514\"\/><\/figure><\/div>\n\n\n<p>B\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y:<\/p>\n\n\n\n<ol>\n<li>\u0110\u1ea7u ti\u00ean t\u1ea3i trang HTML (kh\u00f4ng li\u00ean quan \u0111\u1ebfn YouTube):  <a href=\"https:\/\/static.kiencang.net\/2020\/video-nhung-youtube.html\">https:\/\/static.kiencang.net\/2020\/video-nhung-youtube.html<\/a> (1,1 KB)<\/li>\n\n\n\n<li>T\u1ea3i m\u1ed9t ph\u1ea7n video nh\u00fang: <a href=\"https:\/\/www.youtube.com\/embed\/aZDaxptvefs\">https:\/\/www.youtube[.]com\/embed\/aZDaxptvefs<\/a> (12,3 KB)<\/li>\n\n\n\n<li>T\u1ea3i CSS v\u1ec1: <a href=\"https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/www-player-webp.css\">https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/www-player-webp.css<\/a> (42,9 KB)<\/li>\n\n\n\n<li>T\u1ea3i JS v\u1ec1: <a href=\"https:\/\/www.youtube.com\/yts\/jsbin\/www-embed-player-vflmHus-i\/www-embed-player.js\">https:\/\/www.youtube.com\/yts\/jsbin\/www-embed-player-vflmHus-i\/www-embed-player.js<\/a> (44 KB)<\/li>\n\n\n\n<li>T\u1ea3i JS kh\u00e1c v\u1ec1: <a href=\"https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/player_ias.vflset\/en_US\/base.js\">https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/player_ias.vflset\/en_US\/base.js<\/a> (422,5 KB)<\/li>\n\n\n\n<li>T\u1ea3i DoubleClick: <a href=\"https:\/\/googleads.g.doubleclick.net\/pagead\/id\">https:\/\/googleads.g.doubleclick.net\/pagead\/id<\/a> (1,4 KB)<\/li>\n\n\n\n<li>T\u1ea3i JS t\u1eeb DoubleClick: <a href=\"https:\/\/static.doubleclick.net\/instream\/ad_status.js\">https:\/\/static.doubleclick.net\/instream\/ad_status.js<\/a> (1,0 KB)<\/li>\n\n\n\n<li>T\u1ea3i JS t\u1eeb YouTube: <a href=\"https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/player_ias.vflset\/en_US\/remote.js\">https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/player_ias.vflset\/en_US\/remote.js<\/a>(30,8 KB)<\/li>\n\n\n\n<li>T\u1ea3i JS n\u1eefa t\u1eeb YouTube: <a href=\"https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/player_ias.vflset\/en_US\/embed.js\">https:\/\/www.youtube.com\/s\/player\/d9b4c6ee\/player_ias.vflset\/en_US\/embed.js<\/a> (7,7 KB)<\/li>\n\n\n\n<li>T\u1ea3i \u1ea3nh \u0111\u1ea1i di\u1ec7n c\u1ee7a k\u00eanh:  <a href=\"https:\/\/yt3.ggpht.com\/-aAr4mX1N2EE\/AAAAAAAAAAI\/AAAAAAAAAAA\/GBYgkXHmrCA\/s68-c-k-no-mo-rj-c0xffffff\/photo.jpg\">https:\/\/yt3.ggpht.com\/-aAr4mX1N2EE\/AAAAAAAAAAI\/AAAAAAAAAAA\/GBYgkXHmrCA\/s68-c-k-no-mo-rj-c0xffffff\/photo.jpg<\/a> (4,8 KB)<\/li>\n\n\n\n<li>T\u1ea3i \u1ea3nh \u0111\u1ea1i di\u1ec7n c\u1ee7a video:  <a href=\"https:\/\/i.ytimg.com\/vi\/aZDaxptvefs\/sddefault.jpg\">https:\/\/i.ytimg.com\/vi\/aZDaxptvefs\/sddefault.jpg<\/a> (34,8 KB)<\/li>\n\n\n\n<li>T\u1ea3i font Roboto: <a href=\"https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOlCnqEu92Fr1MmEU9fBBc4.woff2\">https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOlCnqEu92Fr1MmEU9fBBc4.woff2<\/a> (16,5 KB)<\/li>\n\n\n\n<li>T\u1ea3i font Roboto ti\u1ebfp: <a href=\"https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOmCnqEu92Fr1Mu4mxK.woff2\">https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOmCnqEu92Fr1Mu4mxK.woff2<\/a> (16,1 KB)<\/li>\n\n\n\n<li>Ti\u1ebfp t\u1ee5c t\u1ea3i font Roboto: <a href=\"https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOmCnqEu92Fr1Mu7GxKOzY.woff2\">https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOmCnqEu92Fr1Mu7GxKOzY.woff2<\/a> (12,7 KB)<\/li>\n\n\n\n<li>L\u1eb7p l\u1ea1i t\u1ea3i t\u1eeb DoubleClick: <a href=\"https:\/\/googleads.g.doubleclick.net\/pagead\/id\">https:\/\/googleads.g.doubleclick.net\/pagead\/id<\/a> (1,4 KB)<\/li>\n\n\n\n<li>T\u1ea3i t\u1eeb DoubleClick: <a href=\"https:\/\/googleads.g.doubleclick.net\/pagead\/id?slf_rd=1\">https:\/\/googleads.g.doubleclick.net\/pagead\/id?slf_rd=1<\/a> (2,0 KB)<\/li>\n\n\n\n<li>L\u1eb7p l\u1ea1i t\u1ea3i font Roboto: <a href=\"https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOmCnqEu92Fr1Mu7WxKOzY.woff2\">https:\/\/fonts.gstatic.com\/s\/roboto\/v18\/KFOmCnqEu92Fr1Mu7WxKOzY.woff2<\/a> (5,9 KB). T\u00f4i kh\u00f4ng r\u00f5 v\u00ec sao YouTube ph\u1ea3i t\u1ea3i nhi\u1ec1u font Roboto v\u1ec1 \u0111\u1ebfn th\u1ebf!<\/li>\n\n\n\n<li>T\u1ea3i icon c\u1ee7a trang (kh\u00f4ng li\u00ean quan \u0111\u1ebfn YouTube):  <a href=\"https:\/\/static.kiencang.net\/2020\/favicon.ico\">https:\/\/static.kiencang.net\/2020\/favicon.ico<\/a> (ch\u01b0a \u0111\u1ebfn 1KB) <\/li>\n<\/ol>\n\n\n\n<p>Trong khi ch\u1eafc ch\u1eafn \u1ea3nh \u0111\u1ea1i di\u1ec7n k\u00eanh v\u00e0 \u1ea3nh \u0111\u1ea1i di\u1ec7n video s\u1ebd c\u00f3 \u0111\u01b0\u1eddng d\u1eabn ri\u00eang c\u0169ng nh\u01b0 dung l\u01b0\u1ee3ng t\u00f9y thu\u1ed9c v\u00e0o t\u1eebng video c\u1ee5 th\u1ec3, ch\u00fang ta hi\u1ec7n kh\u00f4ng r\u00f5 c\u00e1c video kh\u00e1c nhau c\u00f3 <em>s\u1eed d\u1ee5ng chung ngu\u1ed3n JS v\u00e0 CSS kh\u00f4ng<\/em>, kh\u1ea3 n\u0103ng cao l\u00e0 c\u00f3, nh\u01b0ng ch\u00fang ta v\u1eabn c\u1ea7n ki\u1ec3m tra b\u1eb1ng c\u00e1c video nh\u00fang \u0111\u01a1n gi\u1ea3n kh\u00e1c.<\/p>\n\n\n\n<p>T\u00f4i t\u1ea1o m\u1ed9t trang HTML kh\u00e1c t\u01b0\u01a1ng t\u1ef1 nh\u01b0ng \u0111i k\u00e8m video kh\u00e1c c\u00f9ng thu\u1ed9c m\u1ed9t k\u00eanh v\u1edbi video tr\u01b0\u1edbc:  <a href=\"https:\/\/static.kiencang.net\/2020\/video-nhung-cung-kenh.html\">https:\/\/static.kiencang.net\/2020\/video-nhung-cung-kenh.html<\/a> <\/p>\n\n\n\n<p>K\u1ebft qu\u1ea3 ki\u1ec3m tra cho th\u1ea5y, video c\u00f9ng k\u00eanh t\u1ea3i v\u1ec1 c\u00e1c file CSS, JS v\u00e0 CSS t\u01b0\u01a1ng t\u1ef1, t\u1ea5t nhi\u00ean \u1ea3nh \u0111\u1ea1i di\u1ec7n k\u00eanh th\u00ec v\u1eabn th\u1ebf, nh\u01b0ng \u1ea3nh \u0111\u1ea1i di\u1ec7n video th\u00ec kh\u00e1c.<\/p>\n\n\n\n<p>Ti\u1ebfp theo t\u00f4i t\u1ea1o m\u1ed9t trang HTML c\u0169ng v\u1edbi video nh\u00fang, nh\u01b0ng l\u1ea7n n\u00e0y l\u00e0 kh\u00e1c k\u00eanh: <a href=\"https:\/\/static.kiencang.net\/2020\/video-nhung-khac-kenh.html\">https:\/\/static.kiencang.net\/2020\/video-nhung-khac-kenh.html<\/a> <\/p>\n\n\n\n<p>K\u1ebft qu\u1ea3 ki\u1ec3m tra cho th\u1ea5y, m\u1eb7c d\u00f9 video kh\u00e1c k\u00eanh, t\u1ea5t c\u1ea3 c\u00e1c file CSS, JS v\u00e0 font \u0111\u1ec1u c\u00f3 c\u00f9ng link, \u0111i\u1ec1u n\u00e0y r\u00f5 r\u00e0ng t\u1ea1o kh\u1ea3 n\u0103ng cache r\u1ea5t l\u1edbn, gi\u00fap t\u0103ng t\u1ed1c YouTube, v\u00ec x\u00e1c su\u1ea5t ai \u0111\u00f3 tr\u01b0\u1edbc khi v\u00e0o trang web c\u1ee7a b\u1ea1n c\u00f3 xem video YouTube th\u1eddi gian g\u1ea7n \u0111\u00e2y kh\u00f4ng h\u1ec1 nh\u1ecf (<a href=\"https:\/\/www.similarweb.com\/top-websites\/vietnam\">YouTube.com l\u00e0 website ph\u1ed5 bi\u1ebfn th\u1ee9 3 t\u1ea1i Vi\u1ec7t Nam<\/a>, theo th\u1ed1ng k\u00ea c\u1ee7a SimilarWeb).<\/p>\n\n\n\n<p>\u0110i\u1ec1u \u0111\u00e1ng m\u1eebng l\u00e0 file JS n\u1eb7ng nh\u1ea5t v\u00e0 file CSS c\u00f3 th\u1eddi gian cache l\u00ean \u0111\u1ebfn 1 n\u0103m:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/thoi-gian-cache.png\" alt=\"th\u1eddi gian cache c\u1ee7a c\u00e1c file n\u0103ng tr\u00ean YouTube\" class=\"wp-image-15524\"\/><figcaption class=\"wp-element-caption\">H\u00e3y th\u1eed t\u01b0\u1edfng t\u01b0\u1ee3ng ai \u0111\u00f3 1 n\u0103m g\u1ea7n \u0111\u00e2y ch\u01b0a h\u1ec1 xem YouTube, h\u1eb3n nhi\u00ean con s\u1ed1 n\u00e0y kh\u00f4ng l\u1edbn, n\u00f3i c\u00e1ch kh\u00e1c c\u00e1c t\u00e0i nguy\u00ean n\u1eb7ng c\u1ea7n ph\u1ea3i t\u1ea3i th\u01b0\u1eddng \u0111\u00e3 \u0111\u01b0\u1ee3c cache s\u1eb5n r\u1ed3i.<\/figcaption><\/figure>\n\n\n\n<p>Nh\u01b0 v\u1eady l\u00e0 c\u00e1c plugin lazy load video, ch\u1eb3ng h\u1ea1n nh\u01b0 <a href=\"https:\/\/kiencang.net\/plugin-wp-youtube-lyte\/\">WP YouTube Lyte<\/a> tr\u00ean th\u1ef1c t\u1ebf s\u1ebd c\u00f3 \u00edt t\u00e1c d\u1ee5ng h\u01a1n ti\u1ec1m n\u0103ng m\u00e0 tr\u01b0\u1edbc \u0111\u00f3 ta g\u00e1n cho n\u00f3. D\u00f9 v\u1eady ch\u1eafc ch\u1eafn n\u00f3 v\u1eabn c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9 trang (\u0111\u1eb7c bi\u1ec7t l\u00e0 tr\u00ean m\u00e1y b\u00e0n), b\u1edfi v\u00ec th\u1eddi gian t\u1ea3i t\u00e0i nguy\u00ean ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n v\u1ea5n \u0111\u1ec1 trong chuy\u1ec7n trang b\u1ecb ch\u1eadm, th\u1eddi gian t\u1ea3i trang k\u00e9o d\u00e0i c\u00f2n do n\u00f3 ph\u1ea3i th\u1ef1c thi c\u00e1c \u0111o\u1ea1n m\u00e3 n\u1eefa.<\/p>\n\n\n\n<p>Vi\u1ec7c \u0111\u01b0\u1eddng link c\u00e1c t\u00e0i nguy\u00ean c\u1ee7a YouTube trong URL c\u00f3 c\u00e1c gi\u00e1 tr\u1ecb nh\u01b0 d9b4c6ee, KFOmCnqEu92Fr1Mu7GxKOzY, yt3 cho th\u1ea5y kh\u1ea3 n\u0103ng cao l\u00e0 c\u00e1c t\u00e0i nguy\u00ean n\u00e0y \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef theo khu v\u1ef1c \u0111\u1ec3 t\u0103ng t\u1ed1c (CDN) ho\u1eb7c\/v\u00e0 tr\u00ean c\u00e1c phi\u00ean b\u1ea3n kh\u00e1c nhau t\u01b0\u01a1ng \u1ee9ng v\u1edbi t\u1eebng khu v\u1ef1c.<\/p>\n\n\n\n<p>P\/S:<\/p>\n\n\n\n<ul>\n<li>B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam <a href=\"https:\/\/kiencang.net\/lazy-load-anh-va-video\/\">ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng v\u1ec1 lazy load video \u1edf \u0111\u00e2y<\/a>.<\/li>\n\n\n\n<li>Ngo\u00e0i ra <a href=\"https:\/\/kiencang.net\/lazysizes-js-lazy-load-anh-p1\/\">th\u01b0 vi\u1ec7n lazysizes<\/a> c\u0169ng ch\u1ee9ng t\u1ecf l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 t\u1ed1t \u0111\u1ec3 t\u1ea3i l\u01b0\u1eddi video YouTube.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Video YouTube t\u1ea3i v\u1ec1 m\u1ed9t l\u01b0\u1ee3ng t\u00e0i nguy\u00ean kh\u00f4ng h\u1ec1 nh\u1ecf, g\u1ed3m c\u1ea3 JS, CSS, font v\u00e0 c\u00f3 th\u1ec3 l\u00e0 m\u00e3 nh\u00fang qu\u1ea3ng c\u00e1o c\u1ee7a video. Nh\u1eefng th\u1ee9 n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng l\u00e0 ngu\u1ed3n ch\u1eb7n hi\u1ec3n th\u1ecb \u0111\u00e1ng k\u1ec3, l\u00e0m ch\u1eadm trang. B\u1ea1n d\u1ec5 d\u00e0ng nh\u1eadn th\u1ea5y \u0111i\u1ec1u n\u00e0y khi xem m\u1ed9t trang nh\u00fang video YouTube, v\u00e0 m\u1ed9t trang kh\u00f4ng nh\u00fang video YouTube, t\u1ed1c \u0111\u1ed9 kh\u00e1c bi\u1ec7t l\u00e0 \u0111\u00e1ng k\u1ec3, c\u1ea3 v\u1ec1 th\u1ef1c t\u1ebf, l\u1eabn ki\u1ec3m tra th\u00f4ng qua c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 <a href=\"https:\/\/kiencang.net\/tang-toc-web-pagespeed-insights\/\">Google PageSpeed Insights<\/a> (c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra th\u01b0\u1eddng m\u00f4 ph\u1ecfng l\u01b0\u1ee3t truy c\u1eadp l\u1ea7n \u0111\u1ea7u nh\u01b0 ki\u1ec3u tr\u00ecnh duy\u1ec7t \u0111\u00e3 x\u00f3a h\u1ebft cache, do v\u1eady \u0111i\u1ec3m s\u1ed1 th\u01b0\u1eddng t\u1ec7 h\u01a1n so v\u1edbi th\u1ef1c t\u1ebf t\u1ed1c \u0111\u1ed9 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng). Nh\u01b0ng nh\u01b0 \u0111\u00e3 n\u00f3i, may m\u1eafn l\u00e0 YouTube r\u1ea5t ph\u1ed5 bi\u1ebfn, <a href=\"https:\/\/kiencang.net\/bo-nho-dem-trinh-duyet\/\">th\u1eddi gian cache file tr\u00ean tr\u00ecnh duy\u1ec7t l\u1ea1i l\u00e2u<\/a>, n\u00ean \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 \u0111\u01b0\u1ee3c gi\u1ea3m \u0111i r\u1ea5t nhi\u1ec1u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bonus\"><\/span>Bonus<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>T\u00f4i \u0111\u00e3 n\u00f3i v\u1ec1 chuy\u1ec7n video nh\u00fang s\u1eed d\u1ee5ng CDN s\u1ebd nhanh v\u00e0 nh\u1eb9 h\u01a1n kh\u00e1 nhi\u1ec1u, gi\u1ea3i th\u00edch c\u0169ng d\u1ec5 hi\u1ec3u, l\u00fd do l\u00e0 v\u00ec tr\u00ecnh duy\u1ec7t kh\u00f4ng c\u1ea7n ph\u1ea3i t\u1ea3i c\u1ea3 \u0111\u1ed1ng CSS, JS, \u1ea3nh v\u00e0 font n\u1eefa. Tuy nhi\u00ean t\u00f4i mu\u1ed1n b\u1ea1n th\u1ea5y m\u1ed9t c\u00e1i g\u00ec \u0111\u00f3 tr\u1ef1c quan v\u00e0 d\u1ec5 ki\u1ec3m tra, do v\u1eady t\u00f4i s\u1ebd s\u1eed d\u1ee5ng m\u1ed9t \u0111o\u1ea1n video ng\u1eafn t\u1ef1 host (*), r\u1ed3i d\u00f9ng th\u1ebb <em>&lt;video&gt;<\/em> \u0111\u1ec3 nh\u00fang xem n\u00f3 c\u00f3 nh\u1eb9 h\u01a1n c\u0169ng video \u0111\u00f3 m\u00e0 up l\u00ean YouTube hay kh\u00f4ng. <\/p>\n\n\n\n<p>(*): T\u00f4i t\u1ef1 host l\u00e0 v\u00ec video r\u1ea5t nh\u1eb9 v\u00e0 quan tr\u1ecdng h\u01a1n trang n\u00e0y kh\u00f4ng d\u00f9ng CDN, n\u1ebfu b\u1ea1n host video tr\u00ean CDN bao gi\u1edd c\u0169ng t\u1ed1t h\u01a1n nh\u00e9, v\u1ea5n \u0111\u1ec1 ch\u1ec9 l\u00e0 chi ph\u00ed th\u00f4i (<a href=\"https:\/\/bunnycdn.com\/pricing\">BunnyCDN c\u00f3 kh\u1ea3 n\u0103ng l\u00e0 d\u1ecbch v\u1ee5 CDN cho video c\u00f3 gi\u00e1 th\u00e2n thi\u1ec7n nh\u1ea5t<\/a> v\u00e0o th\u1eddi \u0111i\u1ec3m n\u00e0y).<\/p>\n\n\n\n<p>OK, gi\u1edd l\u00e0 link b\u00e0i vi\u1ebft c\u00f3 ch\u1ee9a video nh\u00fang t\u1ef1 host:  <a href=\"https:\/\/static.kiencang.net\/2020\/video-nhung-tu-host.html\">https:\/\/static.kiencang.net\/2020\/video-nhung-tu-host.html<\/a> <\/p>\n\n\n\n<p>C\u00f2n \u0111\u00e2y l\u00e0 video th\u00f4ng qua YouTube:  <a href=\"https:\/\/static.kiencang.net\/2020\/video-nhung-tu-youtube-mp4.html\">https:\/\/static.kiencang.net\/2020\/video-nhung-tu-youtube-mp4.html<\/a> <\/p>\n\n\n\n<p>V\u00e0 \u0111\u00e2y l\u00e0 c\u00e1c k\u1ebft qu\u1ea3 t\u01b0\u01a1ng \u1ee9ng ch\u1ea5m b\u1eb1ng c\u00f4ng c\u1ee5 Google PageSpeed Insights, t\u1ef1 host \u0111\u01b0\u1ee3c 100 \u0111i\u1ec3m:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/gpi-tu-host.png\" alt=\"t\u1ef1 host \u0111\u01b0\u1ee3c 100 \u0111i\u1ec3m\" class=\"wp-image-15576\"\/><\/figure>\n\n\n\n<p>C\u00f2n nh\u00fang t\u1eeb YouTube \u00edt h\u01a1n kh\u00e1 nhi\u1ec1u:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/gpi-youtube.png\" alt=\"video nh\u00fang t\u1eeb YouTube\" class=\"wp-image-15577\"\/><\/figure>\n\n\n\n<p>B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ki\u1ec3m tra th\u1eddi gian t\u1ea3i th\u00f4ng qua DevTools \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n trong tr\u00ecnh duy\u1ec7t Chrome.<\/p>\n\n\n\n<p>\u0110\u1ea7u ti\u00ean l\u00e0 t\u1ef1 host, n\u00f3 ch\u1ec9 m\u1ea5t th\u1eddi gian t\u1ea3i l\u00e0 1,37s:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/lighthouse-tu-host-1024x362.png\" alt=\"\" class=\"wp-image-15578\"\/><\/figure>\n\n\n\n<p>C\u00f2n YouTube m\u1ea5t h\u01a1n 6s:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/lighthouse-youtube-1024x360.png\" alt=\"lighthouse ki\u1ec3m tra YouTube\" class=\"wp-image-15579\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Trong b\u00e0i vi\u1ebft t\u0103ng t\u1ed1c video YouTube nh\u00fang trong WordPress, ch\u00fang ta \u0111\u00e3 bi\u1ebft YouTube t\u1ea3i n\u1eb7ng nh\u01b0 th\u1ebf n\u00e0o r\u1ed3i, nh\u01b0ng \u0111\u00f3 ch\u1ec9 l\u00e0 m\u00f4 t\u1ea3 t\u1ed5ng quan m\u00e0 th\u00f4i. Trong b\u00e0i n\u00e0y ch\u00fang ta s\u1ebd \u0111i v\u00e0o chi ti\u1ebft, \u0111\u1ec3 bi\u1ebft c\u1ee5 th\u1ec3 YouTube t\u1ea3i v\u1ec1 nh\u1eefng file g\u00ec, d\u00f9ng l\u00e0m g\u00ec v\u00e0 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[274],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>YouTube t\u1ea3i n\u1eb7ng nh\u01b0 th\u1ebf n\u00e0o? &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"description\" content=\"YouTube t\u1ea3i r\u1ea5t nhi\u1ec1u t\u1ea3i nguy\u00ean v\u1ec1, g\u1ed3m ch\u1ee7 y\u1ebfu l\u00e0 JS, CSS, \u1ea3nh v\u00e0 font. Trong b\u00e0i vi\u1ebft n\u00e0y b\u1ea1n s\u1ebd bi\u1ebft c\u1ee5 th\u1ec3 n\u00f3 l\u00e0 file g\u00ec, n\u1eb7ng bao nhi\u00eau. C\u00f3 \u0111i\u1ec1u may m\u1eafn l\u00e0 c\u00e1c file n\u1eb7ng nh\u1ea5t \u0111\u01b0\u1ee3c cache trong th\u1eddi gian r\u1ea5t d\u00e0i.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"YouTube t\u1ea3i n\u1eb7ng nh\u01b0 th\u1ebf n\u00e0o? &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"YouTube t\u1ea3i r\u1ea5t nhi\u1ec1u t\u1ea3i nguy\u00ean v\u1ec1, g\u1ed3m ch\u1ee7 y\u1ebfu l\u00e0 JS, CSS, \u1ea3nh v\u00e0 font. Trong b\u00e0i vi\u1ebft n\u00e0y b\u1ea1n s\u1ebd bi\u1ebft c\u1ee5 th\u1ec3 n\u00f3 l\u00e0 file g\u00ec, n\u1eb7ng bao nhi\u00eau. C\u00f3 \u0111i\u1ec1u may m\u1eafn l\u00e0 c\u00e1c file n\u1eb7ng nh\u1ea5t \u0111\u01b0\u1ee3c cache trong th\u1eddi gian r\u1ea5t d\u00e0i.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kiencang.net\/youtube-tai-nang-nhu-the-nao\/\" \/>\n<meta property=\"og:site_name\" content=\"Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/anhducnguyen87\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-03-27T17:13:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-04-15T09:13:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kiencang.net\/wp-content\/uploads\/2020\/03\/kiem-tra-tu-japan.png\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n \u0110\u1ee9c Anh\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"13 ph\u00fat\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"YouTube t\u1ea3i n\u1eb7ng nh\u01b0 th\u1ebf n\u00e0o? &#8226; Ki\u1ebfn c\u00e0ng","description":"YouTube t\u1ea3i r\u1ea5t nhi\u1ec1u t\u1ea3i nguy\u00ean v\u1ec1, g\u1ed3m ch\u1ee7 y\u1ebfu l\u00e0 JS, CSS, \u1ea3nh v\u00e0 font. 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