Warning messages mask filename from youtube-filename command

[drn05r]

Particularly with Vimeo videos, if access to metadata is restricted this generates a warning. Where this warning is generated, even if the filename gets retrieved the value read in and set as $filename at

youtube_import/lib/plugins/EPrints/Plugin/Import/Youtube.pm

Line 347 in fdd9160

my $filename = <$tmp>;

Looks like the warning message rather than the actual filename.

We should consider setting the --no-warnings flag being added to the youtube-filename invocation to avoid this issue occurring. Others have not been able reproduce this same bug. I am running CentOS 7.9.2009 and youtube-dl-2021.06.06 and have ffmpeg-2.8.15 installed and tested with the following Vimeo URL: https://vimeo.com/321291050