I use Hetzner’s Storage Share (which is a nextcloud instance) as my drive and pay around 5€ / mo for 1 TB. Depending on the features you want you could also use their Storage Box which is more like a plain network drive, and cheaper… like 13€ / mo for 5 TB.
I use Youtube-shorts block -add-on. It rewrites the url for shorts and shows them as normal videos (because they are). IDK why they had to make a new purposefully shitty player for them.
You should be able to do that, you’d just need to set up and maintain the Nextcloud instance yourself :)