YouTube has clearly gone astray: its hoster, Google-Alphabet, can enforce its ContentID system (the infamous "Robocopyright") or its videos recommendation system, all of which appear to be as obscure as unfair.
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.
Direct contact with a human-scale hoster allows for two things: you no longer are the client of a huge tech company, and <strong>you can nurture a special relationship with your hoster, who distributes your data.</strong>
With PeerTube, you get to choose your hosting provider according to their terms of use, such as their disk space limit per user, their moderation policy, who they chose to federate with... You are not speaking with a huge tech company, so you can talk it out in case of any issue, need, desire...
The PeerTube software can, whenever necessary, use a peer-to-peer protocol (P2P) to broadcast viral videos, <strong>lowering the load of their hosts.</strong>
In this way, when you watch a video, your computer contributes to its broadcast. If a lot of people are watching the same video at the same time, their browser automatically send smalls pieces of the video to the other viewers. <strong>The server resources are not over-exploited</strong>: the stream is split, the network optimized.