Participation can be worked on, and contents come right after, be it bad or good (Youtube's also full of low quality contents).
Development (if talking about the engine) can be worked on. Even Kbin Social had some "episodes" because of limited code recently, and now it's working again. e.e"
So possibly that can be worked on too.
About money, that's usually the hardest part, but hopefully people will be conscious about upkeep of their favorite platforms.
So perhaps the PeerTube instances can be a nice option.