PeerTube is distributed streaming, not distributed hosting. The master copy is hosted on some web site, yours or someone else's. If enough people are watching, a peer to peer streaming distribution system kicks in to provide more bandwidth. It's just a way to have many viewers without needing huge hosting bandwidth.
Almost nobody uses PeerTube. Here's the "Trending" list on Hardlimit.[1] 217 views of the top video. A video I posted two days ago to illustrate a bug report is in 9th position, with 14 views. This is pathetic.
Maybe if they got Wordpress integration, so Wordpress sites could serve videos via Peertube, it might take off. And get more sites to support auto-embedding of PeerTube videos, so that just providing a link produces a playable video.