In theory I guess. But you’d need a ton of funding just to get the server power for that, and there’s no guarantee that users will switch over to your service. And if Bluesky starts turning bad then they could start blocking your instance. Also the users are much more valuable than the data. There’s lots of ways this could fail to pan out. The Fediverse is much more flexible to new instances joining.
I like Kdenlive, but I never tried Blender. I think Kdenlive is the good middle-ground complexity for me, DaVinci was too overcomplicated for me just to make a couple of videos a year. I used to use VideoPad, which is ok, it renders faster than Kdenlive, but I think the editing process is less efficient, and it has other issues. In some ways Kdenlive is less stable (crashes more often), but it seems less likely to end up with a project file that becomes unworkable. Sometimes in VideoPad you’d end up with too much stuff and the editing process would become laggy or just cumbersome (limited channels and effects). Kdenlive is a bit more powerful without becoming more complicated.