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.
Like the other tools developed by <a target="_blank" rel="noopener noreferrer" href="https://framasoft.org/en">Framasoft</a>, <strong>PeerTube considers you as a person and not as a product</strong> to be profiled and locked in video loops.