uTube_force_Flash.user.js

// ==UserScript==
// @name          uTube Force Flash (Update required)
// @namespace     YT_flash_force
// @description   Force Flash player embed. Please update: New versions of the userscript are in a new place. This, v0.3.3.x and older are in a file that is to be deprecated; code in the 0.3.3.x branch is unmaintained, might be buggy, and can cause conflicts with Flashblock. | Support inquiries should be opened here: github.com/juneyourtech/GM_YT_Flash/issues | Acknowledgements to Alexander Nartov for providing the initial code, and to Victor Desfe and JAOOTPYKHA for improvements to it. This userscript requires that HTML5 playback be switched off in about:config
// @author        JuneYourTech | github.com/juneyourtech | and contributors
// @updateURL     https://raw.githubusercontent.com/juneyourtech/GM_YT_Flash/master/uTube_force_Flash.user.js
// @downloadURL   https://raw.githubusercontent.com/juneyourtech/GM_YT_Flash/master/uTube_force_Flash.user.js
// @version       0.3.3.4.2
// @encoding      utf-8
// @homepage      https://github.com/juneyourtech/GM_YT_Flash
// @supportURL    https://github.com/juneyourtech/GM_YT_Flash/issues
// @include       *.youtube.com/watch*
// @grant         GM_addStyle
// @grant         GM_getValue
// @grant         GM_setValue
// @grant         GM_registerMenuCommand
// ==/UserScript==
// Notes:
//   * is a wildcard character
//   .tld is magic that matches all top-level domains (e.g. .com, .co.uk, .us, etc.)
/* ____80_character_separator________________________________________________ */

/* 28.07.2017: Code to enable Flash Player, with huge thanks to Alexander Nartov 
   for the bulk of the code, and Victor Desfe for the showinfo/autoplay line.
   Additional credits: JAOOTPYKHA for fixing height/width issues. 
   • Errata: Make sure you have HTML5 switched off for this to work. */

/* Menu commands, autoplay and video quality settings added on 03.08.2017. */
GM_registerMenuCommand('240p', vid_quality_small);
GM_registerMenuCommand('360p', vid_quality_medium);
GM_registerMenuCommand('480p', vid_quality_large);
GM_registerMenuCommand('720p', vid_quality_hd);
GM_registerMenuCommand('1080p', vid_quality_fullhd);
GM_registerMenuCommand('High Res', vid_quality_highres);
GM_registerMenuCommand('Default quality', vid_quality_default);
GM_registerMenuCommand('Autoplay ON', autoplay_on);
GM_registerMenuCommand('Autoplay OFF', autoplay_off);

function vid_quality_small() {
   GM_setValue("video_quality", "small");
   }; //240p

function vid_quality_medium() {
   GM_setValue("video_quality", "medium");
   }; //360p

function vid_quality_large() {
   GM_setValue("video_quality", "large");
   }; //480p

function vid_quality_hd() {
   GM_setValue("video_quality", "hd720");
   }; //HD/720p

function vid_quality_fullhd() {
   GM_setValue("video_quality", "hd1080");
   }; //FullHD/1080p

function vid_quality_highres() {
   GM_setValue("video_quality", "highres");
   }; //High resolution / greater than 1080p

function vid_quality_default() {
   GM_setValue("video_quality", "default");
   };

function autoplay_on() {
   GM_setValue("autoplay", "1");
   };

function autoplay_off() {
   GM_setValue("autoplay", "0");
   };

window.setTimeout(function() {
   var embedFrame = document.createElement("iframe");
   
   embedFrame.src = location.href.replace(/watch\?(?:.*)v=([A-Za-z0-9_-]{11}).*/, "embed/$1");
/* The first inner parentheses group is a non-capturing group, and is not included in '$1'.
   The first group is in place to match stringdata after '\?' and before 'v=', if there is any.
 • The second parentheses group _is_ a capturing group, and remembers the captured data into '$1',
   which is then included after 'embed/'. It captures 11 alphanumeric characters, including 
   an underscore and a dash.   
   */
   
   embedFrame.src = embedFrame.src + ('?showinfo=0&autoplay=' + GM_getValue('autoplay','1') + '&vq=' + GM_getValue('video_quality','default'));
   //GM_getValue here has two parameter values: 
   //get value from storage, if none exists, uses second one
   
   embedFrame.style = "width: 100%; height: 100%;";
   var player = document.getElementById("player-api");
   
   // grab the current dimensions of the player
   var wid = player.clientWidth;
   var hei = player.clientHeight;
   
   player.innerHTML = "";
   
   // set the embedded player's dimensions to proper size
   embedFrame.style.height=hei+'px';
   embedFrame.style.width=wid+'px';
   
   player.appendChild(embedFrame);
   unsafeWindow.spf.dispose();
},
1000);
/* Apparently, setTimeout sets a delay until the function loads.
   1000 = 1 second
   3000 = 3 seconds, etc. */

//29.07.2017: disable static in player area (somewhat resource-intensive)
GM_addStyle("DIV.ytp-error CANVAS.ytp-tv-static {display:none;}");