IPFS is a great technology, but it still seems too young for streaming large files. 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?id=instances-redundancy">redundancy system</a> are more easy for us to use and to maintain.
PeerTube does not impose any remuneration model. This is the choice we have made, and others (like DTube) have made other choices. So it's up to you to see what suits you.
We have a policy for contributions related to security. Please refer to <a target="_blank" rel="noopener noreferrer" href="https://github.com/Chocobozzz/PeerTube/security">our security policy and advisories</a>.