Since the recording, I added playlist export in XSPF format. VLC for example can load + play it. One downside with VLC is that it uses XSPF under the assumption that the audio files are local on your computer or can easily access files referenced by URL on some server - so while some YouTube links do work, YouTube doesn't want people to have players outside of their site or users able to download videos (and tries to actively sabotage/prevent it), because if people use independent software instead of their site, they then don't sell ads (to pay for the hosting/bandwidth costs, compensate monetarized channels, maybe profit too if YouTube eventually/ever stopped operating at a loss), so some YouTube links hang/block and don't play, unfortunately.

Didn't add export via RSS feed - that might be interesting for podcast player software, but then again, probably would have trouble with YouTube's garbled-up streaming with download counter-measures, because it's not a direct link to the media file (maybe some players support it, or is imaginable to integrate youtube-dl).

While Mixtape was primarily to invite other people sharing their favorite best picks for the monthly mix, another personal reason of mine was that YouTube made the automatic "videos I like" playlist private, without asking and without option to make it public/shared again. Furthermore, channels get deleted or striked away, videos get deleted or changed to private, so YouTube links in YouTube playlists (also public ones) break and go 404. In the worst case, a browser bookmark or playlist entry didn't capture the title of the link/upload, so there's then no way for me to later figure out what the link target and medium was, so I've effectively lost an entry. Therefore, don't want to invest/add anything to YouTube's broken playlists any more, and are better off just writing these links down locally or adding/sharing these on a server like this, with some metadata, and I'm not at risk any more of loosing anyth

Obviously, could also support import of existing playlist formats (if these are decent ones).