Latest betas include Apple Music/Spotify integration, Speed control, and brings back the ability to put your videos anywhere (including an external drive!) on Monterey.
It's open source too, according to the description, it streams and doesn't cache videos and apparently it handles 4K HDR. If data usage is a concern to you, be aware that some videos are close to 1 GB.
I use this one on my TV, and it's great, highly recommend.
If bandwidth is a concern, you can also point it towards a local JSON file with whatever URLs you want, so you can mirror the screensavers locally and then stream them from there.
Just in case anyone wants to try it, please grab latest build here instead : https://github.com/JohnCoates/Aerial/releases
Or if you want an installer with auto updates, get it here : https://aerialscreensaver.github.io
Latest betas include Apple Music/Spotify integration, Speed control, and brings back the ability to put your videos anywhere (including an external drive!) on Monterey.