I was thinking of various movies that constantly run on TV, but your comment made me realize that Cars or Polar Express is probably the correct answer. My son was obsessed with those movies when he was young and we had them on constant rotation.
It was buggy and the “Subscribed” feeds weren’t showing anything. I just deleted and reinstalled and it’s working well now.
I like that it shows the full community/instance name with each post. That lets me see where the content is coming from. It seems hidden on another apps I’ve tried.