I have uploaded vlogs of an Italian You Tuber Learning Italian with Lucrezia with the same course name. For the most part everything has gone smoothly however the lessons Vlog 73, Vlog 74 and 37 in Italian don’t have audio.
Edit: I have used this feature for German and Italian and so far it has only happed with Italian.
Let me put my error I received during import here.
Error:detail: ERROR: Signature extraction failed: Traceback (most recent call last): File “/srv/eggs/youtube_dl-2018.11.3-py2.7.egg/youtube_dl/extractor/youtube.py”, line 1221, in _decrypt_signature video_id, player_url, s File “/srv/eggs/youtube_dl-2018.11.3-py2.7.egg/youtube_dl/extractor/youtube.py”, line 1130, in _extract_signature_function res = self._parse_sig_js(code) File “/srv/eggs/youtube_dl-2018.11.3-py2.7.egg/youtube_dl/extractor/youtube.py”, line 1193, in _parse_sig_js jscode, ‘Initial JS player signature function name’, group=‘sig’) File “/srv/eggs/youtube_dl-2018.11.3-py2.7.egg/youtube_dl/extractor/common.py”, line 983, in _search_regex raise RegexNotFoundError(‘Unable to extract %s’ % _name) RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on Issues · ytdl-org/youtube-dl · GitHub . Make sure you are using the latest version; see youtube-dl/README.md at master · ytdl-org/youtube-dl · GitHub on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output. (caused by RegexNotFoundError(u’Unable to extract Initial JS player signature function name; please report this issue on Issues · ytdl-org/youtube-dl · GitHub . Make sure you are using the latest version; see youtube-dl/README.md at master · ytdl-org/youtube-dl · GitHub on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on Issues · ytdl-org/youtube-dl · GitHub . Make sure you are using the latest version; see youtube-dl/README.md at master · ytdl-org/youtube-dl · GitHub on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Depending how busy the server is, there may be a delay for the audio. I’d check back in a few hours and see if it works. Let us know.
I had the same problem a few days ago. I did not have the problem earlier when importing from youtube using the extension.
You can download the audio of the YouTube using convert2mp3.net and then import this audiofile by editing the lesson.
to me it seems like there youtube-dl is way outdated. I already asked support if they want to auto updated but they havent gotten back to me yet and its been like a week. Wish there’d be a way to directly contact a programmer since support probably has no clue what the fuck such an error means.
I think this is the issue and youtube have changed something on their end. I ran into the same problem today so I decided I’d just rip the audio with 4K Youtube Downloader. I last used it a month ago, and an update was available but I just ignored it like I usually do when I’m in a hurry. Nothing from youtube would download, so I installed the update and they downloaded just fine.
yeah when you read the documentation on youtube-dl it says youtube often changes some kinda javascript signature so that might explain it. I’ve the same experience.
I can give a suggestion about it. You dont need to wait for your upload.
After you uploaded the subtitle, go back to youtube.
Right Click two times.
First click will show youtube options.
second will show chrome options.
Press “picture in picture” it will open a small video player bottom right.
You can pause/play the video there. It is not as handy as pressing “space”, but it works 
PS: dont do it inside lingq. because after you click a word, little video player will disappear
