PeerTube is a decentralized and federated alternative to YouTube. The goal of PeerTube is not to replace YouTube but to offer a viable alternative using the strength of ActivityPub and P2P protocols.
Being built on ActivityPub means PeerTube is able to be part of a bigger social network, the Fediverse (the Federated Universe). On the other hand, P2P technologies help PeerTube to solve the issue of money, inbound with all streaming platform : With PeerTube, you don't need to have a lot of bandwidth available on your server to host a PeerTube platform because all users (which didn't disable the feature) watching a video on PeerTube will be able to share this same video to other viewers.
If you are curious about PeerTube, I can't recommend you enough to check the official website to learn more about the project. If after that you want to try to use PeerTube as a content creator, you can try to find a platform available there to register or host yourself your own PeerTube platform on your own server.
The development of PeerTube is actually sponsored by Framasoft, a french non-for-profit popular educational organization, a group of friends convinced that an emancipating digital world is possible, convinced that it will arise through actual actions on real world and online with and for you!
Framasoft is also involved in the development of Mobilizon, a decentralized and federated alternative to Facebook Events and Meetup.
If you want to contribute to PeerTube, feel free to: