Would it be possible to set up some form of CDN. I.e. a service where you could submit torrent links so that "peertubers" could pool their resources somehow, or if you would like to support certain user by making sure that they get the bandwidth?

So I am thinking of nodes that wouldn't actually host the websites but rather only would accept bittorrent URIs and then seeding them. To make sure that the ecosystem doesn't fail.

What would the economics behind this look like? So in short what server providers provide the best deal for just bandwidth. I suppose that this mostly would require bandwidth. The second priority would be storage space of course.

So what seems to be a potential problem with peertube is that if you put up a node and then if you get popular you might run into a bandwidth cap with your VPS. The average user probably wouldn't be interested or have the know how to do this, but I believe it would suffice that if there is a certain percentage of people who have interest in keeping peertube online it might be doable.