Invidious is an alternative front-end to YouTube that doesn’t use the official YouTube API. Instead, it parses the YouTube site’s source code to get the necessary information, similarly as projects like youtube-dl and NewPipe.
The Invidio.us website will soon be shutting down. We recommend using Yewtu.be as an alternative, or creating your own instance using the instructions at the end of this article.
Link: Invidious an open source front-end alternative to YouTube to avoid snooping