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). Nevertheless, PeerTube is not developed by a startup with a team of 50 people, and a workflow full of hyper-formatted processes.