The difference to YouTube is that it's not intended to create a huge platform centralizing videos from the whole world on a single server farm (which is horribly expensive).
Other Framasoft's volunteers and salaried members also contribute to the PeerTube project on various aspects (strategy, communication, development, community animation).
PeerTube uses ActivityPub because this federation protocol is recommended by the W3C and is also used by other projects like the social network <a target="_blank" rel="noopener noreferrer" href="https://joinmastodon.org/">Mastodon</a>.
PeerTube allows platforms to be connected to each other, creating a <strong>big network</strong> of platforms that are both autonomous and interconnected.
It's based on <a target="_blank" rel="noopener noreferrer" href="https://activitypub.rocks">ActivityPub</a> to connect with tools <a target="_blank" rel="noopener noreferrer" href="https://peertube.cpy.re/videos/watch/da2b08d4-a242-4170-b32a-4ec8cbdca701">like Mastodon</a> for example.
It's based on <a target="_blank" rel="noopener noreferrer" href="https://en.wikipedia.org/wiki/WebRTC">WebRTC</a>, a free and open-source project for web browsers.
The PeerTube P2P system based on well established protocols like HTTP and WebRTC, and the <a target="_blank" rel="noopener noreferrer" href="https://docs.joinpeertube.org/admin/following-instances#instances-redundancy">redundancy system</a> are more easy for us to use and to maintain.
PeerTube is part of several actions assembled by Framasoft in the <a target="_blank" rel="noopener noreferrer" href="https://contributopia.org">Contributopia roadmap</a>.
This button displays a frame in which people who upload videos can display text, images, and links freely (link to Patreon, Tipeee, Paypal, Liberapay...).
