Would it be possible to make a desktop application that allows us to host our own video like a YouTube except every video is hosted by the uploader?
Peertube?
Decentralised. Federated. activity pub. Self Hosted. Open source.
Maybe this is what your looking for? Self-hosted video sharing set up through Docker.
Here is an alternative Piped link(s): https://piped.video/watch?v=hHID50gmkYc&
Piped is a privacy-respecting open-source alternative frontend to YouTube.
I’m open-source, check me out at GitHub.
peer Tube? (its not just hosted by the uploader, but close enough?)
You could technically use this one and just mount everyone else’s videos as network drives https://github.com/mediacms-io/mediacms
Yes there is something that’s exactly what you’re looking for: https://github.com/mediacms-io/mediacms