It is a project supported by Framasoft, a French non profit recognized as being of <strong>general interest</strong> and <strong>funded 90% by your donations</strong>.
Remember that PeerTube has only <a href="#who-is-working-on-peertube">one full time developer</a> and a small handful of very involved volunteers. It is not a product developed by a start-up with a full time team and significant financial support.
The feature is called <a href="https://docs.joinpeertube.org/admin/following-instances#instances-redundancy" target="_blank">"server redundancy"</a> and caches your most popular videos to help serve additional viewers.