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").
We recommend you to create your own digital identity, without using "PeerTube" for your project (software name, website domain...) to not confuse people about who is behind the website/project.
While viewers themselves contribute a little additional bandwidth while watching the video in their browsers (mostly during surges), mirroring servers have a much greater uplink and will help your instance with sustained higher concurrent streaming.
With PeerTube, no more opaque algorithms or obscure moderation policies! PeerTube platforms you visit are built, managed and moderated by their owners.