View difference between Paste ID: 1ngsdicv and 2BvTyPcT

 var downloadedFilesCounter = 0;
 var numOfChunksToDownload;
 var downloadQueue = [];
 var currentDownloadName;
 var status = "idle";
 var theWindow = null;
 var firstTimeOpenWindow = 1;
 
 var chunksBaseUrl, quality, chunksURLQuery;
 
 function updataStatus(){
     downloadedFilesCounter++;
     let completedPercentage = (downloadedFilesCounter / (numOfChunksToDownload+1) ) ;
     let fullWidth = $("#progressBar"+downloadQueue[0].playlistid).width();
     let percentageDivWidth = $("#progressBarPercent"+downloadQueue[0].playlistid).width();
     let updatedWidth = parseInt(completedPercentage*fullWidth);
     if ( updatedWidth > percentageDivWidth)
         $("#progressBarPercent"+downloadQueue[0].playlistid).css("width", updatedWidth);
     if ( downloadedFilesCounter == (numOfChunksToDownload+1)  )
         $("#progressBarPercent"+downloadQueue[0].playlistid).css({"background-color": "#e91e63", "width":"100%"}).text("ההורדה הושלמה!");
     else
         $("#progressBarPercent"+downloadQueue[0].playlistid).text("בהורדה: " + parseInt(completedPercentage*100) + "%");
 }
 
 var tmrCheckPlaylistLoad;
 var currentOpenCollectionId = $("#ovc_collections_list").find("li.active").find("a").attr("c-value");
 addDownloadButtons(currentOpenCollectionId);
 
 // add click event for all download buttons
 $(document).on("click", ".downloadButton", function(){
     var url = "https://opal.openu.ac.il/mod/ouilvideocollection/actions.php";
     var context = $(this).attr('context');
     var playlistId = $(this).attr('playlistid');
     downloadQueue.push( { context: context, playlistid: playlistId } );
 
     // add progress bar
     let videoTop = $("#playlist"+playlistId).find(".ovc_playlist_border");
     let progressBarDiv = $("<div id='progressBar"+playlistId+"'></div>").css({"background-color": "#01579B"});
     let progressBarPercentDiv = $("<div id='progressBarPercent"+playlistId+"'>ממתין להתחלת הורדה... <a href='javascript:void(0);' class='cancelDownload' context="+context+" playlistid="+playlistId+" style='color:lightgreen;font-size: 120%;margin-right:10px;'><b>בטל</b></a></div>").css({"color": "white"});
     progressBarDiv.append(progressBarPercentDiv);
     videoTop.prepend(progressBarDiv);
 
     $(".downloadButton[playlistid="+playlistId+"]").hide();
 
     getVideosOnQueue();
 });
 
 // add click event for all cancel download buttons
 $(document).on("click", ".cancelDownload", function(){
     var playlistId = $(this).attr('playlistid');
     downloadQueue = downloadQueue.filter(video => video.playlistid !== playlistId );
     $("#progressBar"+playlistId).remove();
     $(".downloadButton[playlistid="+playlistId+"]").show();
 });
 
 
 // automatically add download buttons when a new collection is loaded
 function onPlaylistLoad(){
     $(".collection_link").each(function(){
         $(this).on("click", function(){
             var cValue = $(this).attr("c-value");
             tmrCheckPlaylistLoad = setInterval(function(){handleCollectionChange(cValue)}, 300);
         });
     });
 }
 onPlaylistLoad();
 
 function handleCollectionChange (cValue) {
     if( $('#collection'+cValue).is(':visible') ){
         addDownloadButtons(cValue);
         clearInterval(tmrCheckPlaylistLoad);
     }
 }
 
 // adds download buttons to an open collection( a collection that has been loaded )
 function addDownloadButtons(collectionId) {
     // add buttons only if not been added before
     if ( $( "#collection"+collectionId ).find("button").length == 0 ) {
         var collectionDiv = $("#collection"+collectionId);
         var currentContext = collectionDiv.attr("cid");
         var videoCount = 0;
         collectionDiv.children().each(function(i) {
             let videoDescription = $(this).find("span.instructor_row");
             let currentPlaylistId = $(this).attr("id").substring(8);
             let buttonElement = $("<button></button>").text("הורד סרטון").attr('class','downloadButton').attr('context',currentContext).attr('playlistid',currentPlaylistId);
             buttonElement.css({"margin-right":"10px","background":"rgb(202, 60, 60)","color":"white","borderRadius":"4px","textShadow":"0 1px 1px rgba(0, 0, 0, 0.2)"});
             videoDescription.append(buttonElement);
         });
     }
 }
 
 
 function getPlaylistFile(context, playlistid){
     var courseIdStart = $('.coursename_header').children()[0].href.indexOf("id=");
     var courseIdNum = $('.coursename_header').children()[0].href.substring(courseIdStart+3);
     jQuery.ajax({
         type: "POST",
         url: "https://opal.openu.ac.il/mod/ouilvideocollection/actions.php",
         data: {action: "getplaylist", context: context, playlistid: playlistid, course: courseIdNum},
         success: function(data) {
           let anotherURL = "https://opal.openu.ac.il/local/ouil_video/player.php?mediaid=" + data.media.cipher;
           currentDownloadName = data.title;
 
 					$.get(anotherURL, function(data) {
 						let mediaStart = data.indexOf("media: ");
 						let mediaEnd = data.indexOf("\"", mediaStart+11);
 						let myMedia = data.substring(mediaStart+8, mediaEnd);
 						let url = myMedia;
 
 						$.get(url, function(data) {
                             let playlistStart = data.indexOf("file=")+5;
                             let playlistEnd = data.indexOf("\"", playlistStart+8);
                             var playlistURL = data.substring(playlistStart+1, playlistEnd).replace("&amp;", "&");
                             let url = playlistURL;
 
 							$.get(url, function(data) {
 								let baseURL = playlistURL.substring(0, playlistURL.indexOf("playlist."))
 								let quality_list = data.match(/BANDWIDTH=\d+/g).map(function(n){return parseInt(n.replace("BANDWIDTH=", ""))}).sort(function(a,b){ return a-b; });
 								let highestQuality = quality_list[quality_list.length-1];
 								let URLQuery = playlistURL.substring(playlistURL.indexOf("?"));
 
 								chunksBaseUrl = baseURL;
 								quality = highestQuality;
 								chunksURLQuery = URLQuery;
 								let url = chunksBaseUrl+"chunklist_b"+quality+".m3u8"+chunksURLQuery;
 								$.get(url, function(data) {
 									data = data.split("\n");
 									let lastChunkLine = data[data.length-3];
 									let lastChunkStart = lastChunkLine.indexOf("_", lastChunkLine.indexOf(quality));
 									let lastChunkEnd = lastChunkLine.indexOf(".ts");
 									let lastChunkNum = lastChunkLine.substring(lastChunkStart+1, lastChunkEnd);
 									numOfChunksToDownload = parseInt(lastChunkNum);
 									startVideoDownload();
 								});
 							});
 						}, "text");
 					});
         }
     });
 }
 
 function getVideosOnQueue(){
     if ( downloadQueue.length > 0 && status === "idle"  ){
         status = "downloading";
         $("#progressBar"+downloadQueue[0].playlistid).css({"background-color": "#ddd"});
         $("#progressBarPercent"+downloadQueue[0].playlistid).css({"background-color": "#4CAF50", "display": "inline-block", "font-weight": "bold"}).html("בהורדה: 0%");
         getPlaylistFile(downloadQueue[0].context, downloadQueue[0].playlistid);
     }
 }
 
 function startVideoDownload(){
     if ( theWindow === null ){
         theWindow = window.open('https://opal.openu.ac.il/'+new Date().getTime(), "", 'toolbar=no,status=no,width=250,height=100');
         if (theWindow == null || typeof(theWindow)=='undefined') {
             alert('יש לאפשר פתיחת חלון נוסף (popup). ליד שורת הכתובת בדפדפן מופיע סימן קטן של אפשרות לאפשר popup,\n יש ללחוץ עליו ולבחור ב "Always allow pop-ups from. לאחר מכאן לרענן את הדף ולהפעיל שוב את הסקריפט. אחרי פעולה זה הסקריפט יפעל כהלכה.');
         }
     }
     var theDoc = theWindow.document,
     theScript = document.createElement('script');
 
     function injectThis() {
 		var fileData = [];
 
         function addData(data, index){
             fileData[index] = data;
             window.opener.updataStatus();
             if ( window.opener.downloadedFilesCounter == (window.opener.numOfChunksToDownload+1) ){
                 saveDownloadedFile();
                 setTimeout(function(){window.opener.windowFinishedDownloading()}, 200);
             }
         }
 
         function startVideoDownload(chunksBaseUrl, quality, chunksURLQuery){
             for (i = 0; i <= window.opener.numOfChunksToDownload; i++) {
                 let currentIndex = i;
                 let xhr = new XMLHttpRequest();
                 let url=chunksBaseUrl+"media_b"+quality+"_"+i+".ts"+chunksURLQuery;
                 xhr.open('GET', url, true);
                 xhr.responseType = 'blob';
                 xhr.onload = function(e) {
                      addData(xhr.response, currentIndex);
                 }
                 xhr.addEventListener("error", function(){ retryFailedRequest(chunksBaseUrl, quality, chunksURLQuery, currentIndex); });
                 xhr.send();
             }
         }
 
         function retryFailedRequest(chunksBaseUrl, quality, chunksURLQuery, chunkNumber){
             let currentIndex = chunkNumber;
             let xhr = new XMLHttpRequest();
             let url = chunksBaseUrl+"media_b"+quality+"_"+currentIndex+".ts"+chunksURLQuery;
             xhr.open('GET', url, true);
             xhr.responseType = 'blob';
             xhr.onload = function(e) {
                 addData(xhr.response, currentIndex);
             }
             xhr.addEventListener("error", function(){ setTimeout(function(){ retryFailedRequest(chunkStartUrl, chunkEndNameWithoutExtension, chunkNumber); }, 5000); });
             xhr.send();
         }
 
         function saveDownloadedFile() {
             let blob = new Blob(fileData, {type: "video/mp2t"});
             let a = document.body.appendChild(document.createElement('a'));
             let objectURL2 = URL.createObjectURL(blob);
             a.href = objectURL2;
             a.download = window.opener.currentDownloadName+".ts";
             a.click();
             a.remove(a);
 
             URL.revokeObjectURL(objectURL2);
             blob = null;
             a = null;
 
             // reset data for next download
             fileData = [];
             window.opener.downloadedFilesCounter = 0;
             window.opener.status = "idle";
             window.opener.downloadQueue.shift();
         }
 
         startVideoDownload(window.opener.chunksBaseUrl, window.opener.quality, window.opener.chunksURLQuery);
     }
     if ( firstTimeOpenWindow ){
         theScript.innerHTML = 'window.onload = ' + injectThis.toString() + ';';
         firstTimeOpenWindow = 0;
     }
     else {
         theScript.innerHTML = injectThis.toString() + 'injectThis();';
     }
     theDoc.body.appendChild(theScript);
 }
 
 function windowFinishedDownloading(){
     if ( downloadQueue.length === 0 ){
         theWindow.close();
         theWindow = null;
         firstTimeOpenWindow = 1;
     }
     else {
         theWindow.location.reload();
         getVideosOnQueue();
     }
 }