would be interested to have a look if you happened to have a repo setup or a blog post explaining! prob won't necessarily setup something myself but always been curious about this kind of thing

It's really as easy as asking Opus 5.5 and/or DeepSeek 4.1 (if Opus has moral issues) to set this up. I have the same. I've got a Download playlist which synchronises everything automatically. It had some issues where YouTube detected ytdl and throttled the download or limited video quality, so I set up a container with a full browser and fake browser fingerprint attributes, then downloaded at 1.5x (that was the limit before it throttled again). Just spar with Opus a bit if you encounter these issues.

Are you running this locally? This is something I've considered but never felt like putting the effort to complete

Yes, on my local box that's on 24x7.

How often do you get those emails?

Less often than what I would've expected. But when it did happen I was very glad I had it running.