Found a YT link what cannot download

[xuntan]

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Bug report

If the problem occurs when downloading a URL please provide the full verbose output as follows:

1. Restart youtube-dl-gui
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delete me and insert your log content here

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[xuntan]

I found a link what youtube-dlg cannot download . It reports "Error" in dialog box. https://www.youtube.com/watch?v=Ir7pVCwFFj4 Other downloaders can donload it. Update: While I am playing it in opera browser, the downloading was completed.

[09/18/18 13:57:00] WARNING: Falling back on generic information extractor.
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\youtube.py", line 1210, in _decrypt_signature
[09/18/18 13:57:00] ERROR: Signature extraction failed: Traceback (most recent call last):
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\youtube.py", line 1121, in _extract_signature_function
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\youtube.py", line 1210, in _decrypt_signature
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\youtube.py", line 1182, in _parse_sig_js
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\youtube.py", line 1121, in _extract_signature_function
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\common.py", line 972, in _search_regex
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\youtube.py", line 1182, in _parse_sig_js
[09/18/18 13:57:00] youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[09/18/18 13:57:00]   File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpsjdqsmfs\build\youtube_dl\extractor\common.py", line 972, in _search_regex
[09/18/18 13:57:00]  (caused by RegexNotFoundError('Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[09/18/18 13:57:00] youtube_dl.utils.RegexNotFoundError: Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[09/18/18 13:57:00]  (caused by RegexNotFoundError('Unable to extract Initial JS player signature function name; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[09/18/18 14:02:55] WARNING: video doesn't have subtitles
[09/18/18 14:04:34] WARNING: video doesn't have subtitles
[09/18/18 14:04:34] WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[09/18/18 14:52:49] WARNING: video doesn't have subtitles
[09/18/18 14:52:49] WARNING: Requested formats are incompatible for merge and will be merged into mkv.