Seems nice, but you need an external Player to watch the content, which can be goof for some people, but I like the webUI of TubeArchivist (even though it can be enhanced for sure)

I archive youtube videos that I like with TubeArchivist, I have a playlist for random videos i’d like to keep, and also subscribe to some of my favourite creator so I can keeptheir videos, even when I’m offline

Probably here : https://serverpartdeals.com/collections/hard-drives They sold 18TB drives for 100€ last months