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.