Вопросы по Опере

// ==UserScript==
// @name        YouTube force flash
// @version     4
// @author      Bladru
// @description Forces YouTube to use flash player instead of HTML5 one.
// @include     https://*.youtube.com/*
// @include     https://*.youtube-nocookie.com/*
// @include     https://*.youtubeeducation.com/*
// @include     https://*.googleapis.com/*
// ==/UserScript==

/*
Opera only. Save as "YouTube_force_flash.js" (without .user).
http://forum.ru-board.com/topic.cgi?forum=5&topic=48802&start=1040#19
*/

(function(){
function patch_scripts(UserJSEvent){
var script = UserJSEvent.element;

/* replacing 'if(!b)' in function(a,b) with 'if(!(b="flash"))' */
var regex_match = /(\)\{if\(!)b(\)\{var c;if\(!\(c=!a\.[\w$]+\.html5&&[\w$.]+\(a\)\)\)\{if\(![\w$.]+\(a\.[\w$]+\.disable\.html5\)\))/;
var str_replace = '$1(b="flash")$2';

if (script.src.match(/\/www-[^\/]*\/base\.js$/)
   || script.src.match(/\/www-[^\/]*\/www-embed-player\.js$/)
   || script.src.match(/\/www-[^\/]*\/www-pageframe\.js$/) // not sure where is it used
){
 // console.debug(script.src);
 if (!regex_match.test(script.text))
  console.warn('YouTube_force_flash: no match found in ' + script.src);
 
 script.text = script.text.replace(regex_match, str_replace);
}
/* RegEx to escape js code:
string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
*/

/* one of the targeted functions:
Jh=function(a,b){if(!a.isDisposed()){if(!b){var c;if(!(c=!a.C.html5&&Hh(a))){if(!g.ja(a.C.disable.html5)){var d;c=!0;void 0!=a.C.args.deviceHasDisplay&&(c=a.C.args.deviceHasDisplay);if(2.2==Lh)d=!0;else{a:{var e=c;c=g.r("yt.player.utils.videoElement_");c||(c=g.xd("VIDEO"),g.p("yt.player.utils.videoElement_",c,void 0));try{if(c.canPlayType)for(var e=e?Qba:Rba,h=0;h<e.length;h++)if(c.canPlayType(e[h])){d=null;break a}d="fmt.noneavailable"}catch(k){d="html5.missingapi"}}d=!d}d&&(d=Mh(a)||a.C.assets.js);
a.C.disable.html5=!d;d||(a.C.args.html5_unavailable="1")}c=!!a.C.disable.html5}b=c?Hh(a)?"flash":"unsupported":"html5"}("flash"==b?a.FR:a.GR).call(a)}};
*/
}

window.opera.addEventListener('BeforeScript', patch_scripts);

/* disable HTML5 player creation on youtube.com pages */
function prevent_create(UserJSEvent){
if (window.yt && yt.player && yt.player.Application)
 yt.player.Application.create = function(){};
}

window.opera.addEventListener('AfterScript', prevent_create);

})();