I like these types of video websites, but a huge reason they will never beat YouTube is the age. YouTube has a huge abundance of content that spans pretty far back. When you have that much content its kinda hard to beat.
How much of the content you enjoyed on Youtube ten years ago is still there? I've witnessed a lot of videos taken down... I'd much rather trust a non-profit host with my content than Youtube.
While yes there are a lot of videos that are taken down, you can still find tons of videos from like 8-10 years ago easily. I noticed though that a lot of the older videos usually get taken down for copyright music, like old amvs, song re-uploads, etc. Don't get me wrong I'm not trying to say, "Oh Google and YouTube are so great". I am only pointing out why many people including me will not fully switch over to other video platforms. Most other video platforms lack any content, and finding what you want is incredibly difficult. Where as YouTube you can find a plethora of things. Do I trust YouTube with my content? Yes, I don't really watch too many things which YouTube would want to censor like news or anything like that, and I usually watch stuff from certain channels (not recommended videos). Seriously, I dislike YouTube as much as the next person, but I am not going to switch over to an inferior platform (inferior in terms of content). Those people that are focused on open source, nonprofit, and privacy when it comes to platforms should continue to support and use this stuff, but understand most regular people don't care. Not saying it is not a problem, I just simply don't feel the need to fight YouTube that much and try to be a digital warrior about it.