It is possible to use certificates validated by a certification authority.However, this requires advanced system administration knowledge.Indeed, due to the multitude of possible use cases, it is impossible to document all situations here.This documentation will therefore only explain the goal to be reached, and give an example which will only be suitable for a "basic" situation (manual installation of Peertube, using letsencrypt).If you are in another situation (Docker installation, certificates signed by another authority, etc...), you will have to adapt this approach by yourself.