I hope Peertube gains traction, but they're fighting an uphill battle when it comes to the centralized competition.
The problem that PeerTube cannot solve is engagement and stability:
- Engagement: Unlike Youtube they cannot use a recommender system like for suggestions. Most Youtube views are from recommendations and related videos.
- Stability: As a business or media outlet, I will link to a Youtube video but not a PeerTube video because I know Youtube will host it indefinitely.
If you want the video to stay up indefinitely (or at least as long as your company continues operating) you should probably host it yourself (e.g. on your own PeerTube instance), because YouTube might take it down whenever they feel like it.
Also, a new platform doesn't have to solve every problem with the old one to be an improvement. Decentralized content delivery with a centralized recommendation engine might still be enough to compete if centralized content delivery platforms screw up badly enough.
Maybe they could recommend content by storing the content metadata/viewcounts/social graph in a FLOOD style network like Aether.
Then the content itself is just linked via an IPFS/DAT url within the metadata.
I won't be missing yt's recommendations at all. If peertube can implement related videos only based on the current video and nothing else, that would be great though.