Except, again, it is not a competing solution. I often point out the stupidity of arguing that Gimp is at all comparable to Photoshop except… this isn’t even something that is useful for a hobbyist to do touch ups. There is basically zero use case barring providing tools for companies to base their products on. Because the cost of video hosting is just not something people are willing to pay. That is WHY youtube became a thing.
As for liability: Go allow open uploads of videos to your server. And let me know how long until you see a ten year old getting gangraped by a bunch of guys in masks. The “joke” was always that if you had an un-secured FTP you would get a LOT of free porn and… that is what you get. Because people are monsters. This is why a lot of Lemmy instances have turned off image uploading and are wary of the implications of federation with the really sketchy instances.