Storage: can be mitigated using <a target="_blank" rel="noopener noreferrer" href="https://docs.joinpeertube.org/maintain/remote-storage">S3/Object storage</a>
This means that anyone can download and install PeerTube to host videos on a specific domain name (this is called "hosting a PeerTube platform/website").
This should not be a problem with SSD disks, whereas traditional HDD should be accounted for: typical sustained read rates for a well tuned system with a 7200rpm hard disk should hover around 120 MB/s or 960 Mbit/s. The latter should be enough for a typical 1 Gbit/s network uplink.