and this failed with something about a failed certificate,. This led me to consider possible updates of the software, as via youtube-dl -U but this was rejected. Then via the Software Manager I tried ...

Small command-line program to download videos from YouTube.com and other video sites - nagyist/youtube-dl.python ...

GitHub has reinstated today the youtube-dl open-source project, a Python library that lets users download the source audio and video files behind YouTube videos. GitHub, a code-hosting repository, had ...

At this point, you’ve likely heard that the GitHub repository for youtube-dl was recently removed in response to a DMCA takedown notice filed by the Recording Industry Association of America (RIAA).