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Also here is bookmarklet version of the script:

javascript:(function(){function%20makeTimeline(time)%7Bvar%20string%2Ctime_array%3D%5B%5D%2Cmilliseconds%3DMath.round(time%251*1000).toString()%3Bwhile(3%3Emilliseconds.length)%7Bmilliseconds%3D'0'%2Bmilliseconds%3B%7Dtime_array.push(Math.floor(time%2F(60*60)))%3Btime_array.push(Math.floor((time-(time_array%5B0%5D*60*60))%2F60))%3Btime_array.push(Math.floor(time-((time_array%5B1%5D*60)%2B(time_array%5B0%5D*60*60))))%3Bfor(var%20i%3D0%2Cil%3Dtime_array.length%3Bi%3Cil%3Bi%2B%2B)%7Bstring%3D''%2Btime_array%5Bi%5D%3Bif(1%3D%3D%3Dstring.length)%7Btime_array%5Bi%5D%3D'0'%2Bstring%3B%7D%7Dreturn%20time_array.join('%3A')%2B'%2C'%2Bmilliseconds%3B%7D%3Bfunction%20returnSRT(data)%7Bvar%20caption%2Cprevious_start%2Cstart%2Cend%2Ctemp%2Ccaptions%3Ddata.getElementsByTagName('text')%2Csrt_output%3D''%3Bfor(var%20i%3D0%2Cil%3Dcaptions.length%3Bi%3Cil%3Bi%2B%2B)%7Bcaption%3Dcaptions%5Bi%5D%3Bstart%3D%2Bcaption.getAttribute('start')%3Bif(0%3C%3Dprevious_start)%7Btemp%3Dcaptions%5Bi-1%5D.textContent.replace(%2F%3C%2Fg%2C'%26lt%3B').replace(%2F%3E%2Fg%2C'%26gt%3B')%3Bsrt_output%2B%3Di%2B'%5Cn'%2BmakeTimeline(previous_start)%2B'%20--%3E%20'%2BmakeTimeline(start)%2B'%5Cn'%2Btemp%2B'%5Cn%5Cn'%3Bprevious_start%3D-1%3B%7Dif(end%3D%2Bcaption.getAttribute('dur'))end%3Dstart%2Bend%3Belse%7Bif(captions%5Bi%2B1%5D)%7Bprevious_start%3Dstart%3Bcontinue%3B%7D%7Dtemp%3Dcaption.textContent.replace(%2F%3C%2Fg%2C'%26lt%3B').replace(%2F%3E%2Fg%2C'%26gt%3B')%3Bsrt_output%2B%3Di%2B'%5Cn'%2BmakeTimeline(start)%2B'%20--%3E%20'%2BmakeTimeline(end)%2B'%5Cn'%2Btemp%2B'%5Cn%5Cn'%3B%7D%3Breturn%20srt_output%3B%7Dwindow.location.href%3D'data%3Atext%2Fplain%3Bbase64%2C'%2Bbtoa(returnSRT(document.documentElement))})(); 

function makeTimeline (time) { var string, time_array = [], milliseconds = Math.round(time % 1 * 1000).toString(); while (3 > milliseconds.length) { milliseconds = '0' + milliseconds; } time_array.push(Math.floor(time / (60 * 60))); time_array.push(Math.floor((time - (time_array[0] * 60 * 60)) / 60)); time_array.push(Math.floor(time - ((time_array[1] * 60) + (time_array[0] * 60 * 60)))); for (var i = 0, il = time_array.length; i < il; i++) { string = '' + time_array[i]; if (1 === string.length) { time_array[i] = '0' + string; } } return time_array.join(':') + ',' + milliseconds; }; function returnSRT (data) { var caption, previous_start, start, end, temp, captions = data.getElementsByTagName('text'), srt_output = ''; for (var i = 0, il = captions.length; i < il; i++) { caption = captions[i]; start = +caption.getAttribute('start'); if (0 <= previous_start) { temp = captions[i - 1].textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(previous_start) + ' --> ' + makeTimeline(start) + '\n' + temp + '\n\n'; previous_start = null; } if ( end = +caption.getAttribute('dur')) end = start + end; else { if (captions[i + 1]) { previous_start = start; continue; } } temp = caption.textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(start) + ' --> ' + makeTimeline(end) + '\n' + temp + '\n\n'; }; textarea = null; return srt_output; } returnSRT(document.documentElement) 

function makeTimeline (time) { var string, time_array = [], milliseconds = Math.round(time % 1 * 1000).toString(); while (3 > milliseconds.length) { milliseconds = '0' + milliseconds; } time_array.push(Math.floor(time / (60 * 60))); time_array.push(Math.floor((time - (time_array[0] * 60 * 60)) / 60)); time_array.push(Math.floor(time - ((time_array[1] * 60) + (time_array[0] * 60 * 60)))); for (var i = 0, il = time_array.length; i < il; i++) { string = '' + time_array[i]; if (1 === string.length) { time_array[i] = '0' + string; } } return time_array.join(':') + ',' + milliseconds; }; function returnSRT (data) { var caption, previous_start, start, end, temp, captions = data.getElementsByTagName('text'), srt_output = ''; for (var i = 0, il = captions.length; i < il; i++) { caption = captions[i]; start = +caption.getAttribute('start'); if (0 <= previous_start) { temp = captions[i - 1].textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(previous_start) + ' --> ' + makeTimeline(start) + '\n' + temp + '\n\n'; previous_start = -1; } if ( end = +caption.getAttribute('dur')) end = start + end; else { if (captions[i + 1]) { previous_start = start; continue; } } temp = caption.textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(start) + ' --> ' + makeTimeline(end) + '\n' + temp + '\n\n'; }; return srt_output; } returnSRT(document.documentElement) 

Use "Network inspector" function of your browser's script debugger and find second request to timedtext page then just copy all that request to the addressbar to download transcribed subtitles in native YouTube xml format.

To get SRT version just run this code in the debugger console for that xml's page:

function makeTimeline (time) { var string, time_array = [], milliseconds = Math.round(time % 1 * 1000).toString(); while (3 > milliseconds.length) { milliseconds = '0' + milliseconds; } time_array.push(Math.floor(time / (60 * 60))); time_array.push(Math.floor((time - (time_array[0] * 60 * 60)) / 60)); time_array.push(Math.floor(time - ((time_array[1] * 60) + (time_array[0] * 60 * 60)))); for (var i = 0, il = time_array.length; i < il; i++) { string = '' + time_array[i]; if (1 === string.length) { time_array[i] = '0' + string; } } return time_array.join(':') + ',' + milliseconds; }; function returnSRT (data) { var caption, previous_start, start, end, temp, captions = data.getElementsByTagName('text'), srt_output = ''; for (var i = 0, il = captions.length; i < il; i++) { caption = captions[i]; start = +caption.getAttribute('start'); if (0 <= previous_start) { temp = captions[i - 1].textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(previous_start) + ' --> ' + makeTimeline(start) + '\n' + temp + '\n\n'; previous_start = null; } if ( end = +caption.getAttribute('dur')) end = start + end; else { if (captions[i + 1]) { previous_start = start; continue; } end = PLAYER.getDuration(); } temp = caption.textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(start) + ' --> ' + makeTimeline(end) + '\n' + temp + '\n\n'; }; textarea = null; return srt_output; } returnSRT(document.documentElement) 

Use "Network inspector" function of your browser's script debugger and find second request to timedtext page after enabling transcribed subtitles then just copy all that request to the addressbar to download them in native YouTube xml format.

To get SRT version run this code in the debugger console for that xml's page:

function makeTimeline (time) { var string, time_array = [], milliseconds = Math.round(time % 1 * 1000).toString(); while (3 > milliseconds.length) { milliseconds = '0' + milliseconds; } time_array.push(Math.floor(time / (60 * 60))); time_array.push(Math.floor((time - (time_array[0] * 60 * 60)) / 60)); time_array.push(Math.floor(time - ((time_array[1] * 60) + (time_array[0] * 60 * 60)))); for (var i = 0, il = time_array.length; i < il; i++) { string = '' + time_array[i]; if (1 === string.length) { time_array[i] = '0' + string; } } return time_array.join(':') + ',' + milliseconds; }; function returnSRT (data) { var caption, previous_start, start, end, temp, captions = data.getElementsByTagName('text'), srt_output = ''; for (var i = 0, il = captions.length; i < il; i++) { caption = captions[i]; start = +caption.getAttribute('start'); if (0 <= previous_start) { temp = captions[i - 1].textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(previous_start) + ' --> ' + makeTimeline(start) + '\n' + temp + '\n\n'; previous_start = null; } if ( end = +caption.getAttribute('dur')) end = start + end; else { if (captions[i + 1]) { previous_start = start; continue; } } temp = caption.textContent.replace(/</g, '&lt;').replace(/>/g, '&gt;'); srt_output += i + '\n' + makeTimeline(start) + ' --> ' + makeTimeline(end) + '\n' + temp + '\n\n'; }; textarea = null; return srt_output; } returnSRT(document.documentElement)