I think it was mostly youtube and retrojunk.com
Try searching for "$channel bump"
Personally, I think Adult Swim had the best bumps, usually just some nice house music with a nice animation and some funny quotes.
Re:Show HN: If YouTube had actual channels
by ChadNauseam on Wednesday August 14, 2024 @02:23PM
(#41249023)
I'm really interested in this but I'm having trouble googling. What is a bump? Is it referring to this? https://en.wikipedia.org/wiki/Bumper_(broadcasting)
Yup. Here's a playlist for adult swim ones. I just used yt-dlp and passed in the playlist URL and it will download all the bumps as separate files:
https://www.youtube.com/watch?v=HS8kchdwFPM&list=PL075thqiB6...
Where were you able to find these? Recreating one of these channels has been a side project I’ve wanted to do for ages.