Maidsafe isn't ready yet. Sia or Storj neither. Have you tried Maid? Its very basic and I was a bit disappointed about the release. Would be better to pick something which may get ready during this decade.
In a blockchain model content would have to be replicated across many servers, to guarantee availability. I'm not a big fan of storage on the blockchain, in a public model. It may become interesting for private clusters in data centers, though.
Streaming video is expensive, consumes a lot of traffic and disk space. And content would have to be controlled in some way, otherwise it would be full of porn and other explicit or criminal content soon.
I could understand the YouTube policies in a way. To monetize on video the content has to be appealing to the viewers. No advertiser would like to see their ads on some lo-life clip.