I’ve definitely read several write ups of delightful nerds who have set up in-house 24/7 channels sourcing from their libraries of content. A “Friends” channel, 90s toons channel, etc. I wish I could find you some links.
>>xp84+(OP)
I've got one of these projects. It's written in Python and buggy as hell (so I have kept the repo private until I have something others will enjoy).
The "schedule" is JSON, so it was easy enough to write a web page that parses today's schedule and presents it TV-Guide style: https://engineersneedart.com/UHF/
(Gaps in airtime are filled with shorts of various kinds.)