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.
The difference to YouTube is that it's not intended to create a huge platform centralizing videos from the whole world on a single server farm (which is horribly expensive).
The ambition remains to be <strong>a free and decentralized alternative</strong>: the goal of an alternative is not to replace, but to propose something else, with different values, in parallel to what already exists.
Test PeerTube REST API with the <a target="_blank" rel="noopener noreferrer" href="https://docs.joinpeertube.org/api/rest-getting-started">getting started guide</a>
<strong>With PeerTube, you don't have to please to the algorithms</strong> by artificially altering your content: PeerTube platforms are managed and moderated by humain beings like you and us, not by robots.