I can confirm, I have not added a single thing to #PeerTube outside of what comes with it. There should be (as far as I aware) zero tracking, etc. PeerTube does, however, use P2P connections to help lighten the load on servers, so that's likely what is causing those notifications.
This should be a setting you can disable if you have an account on TILvids (or any PeerTube instance) so that you don't act as a P2P node while watching videos.