There is no official instance. framatube.org is the instance running by their developers, but it's by far not the largest.
You can get an overview at https://peertube.fediverse.observer/list about all existing instances, but PeerTube-instances are rather not general than in case of Mastodon or Lemmy.
so what to i do to not fear losing my videos if the instance i choose closes down??? whats an instance i can rely on?
If you want to be sure that your content will never be lost (and that means to be aware about the risk behind that on the other hand!), you should rather choice blockchain-based services like Odysee instead of federated services.
To avoid losing content on PeerTube, you can (home)seed your videos via BitTorrent-torrent clients that support WebSocket like BiglyBT or Webtorrent. So if an instance goes down, your content will still be available via P2P. But protection from depublication really isn't a strength of PeerTube just like the rest of the Fediverse.
Anyway tube.tchncs.de I would trust mostly to stay for a very long time as these guys are Fediverse-enthusiast.
If you want to be sure that your content will never be lost (and that means to be aware about the risk behind that on the other hand!), you should rather choice blockchain-based services like Odysee instead of federated services.
Why? Isn't Odyssee a company? What if they go bust? The blockchain does nothing. It doesn't store the videos, that's for sure.
Why? Isn’t Odyssee a company? What if they go bust?
Then you are lucky and at least the content is no longer listed. The stuff remains on the LBRY network anyway, if I have understood how it works correctly.
It allows anyone to create an account and register content that cannot be deleted by the company.
The stuff remains on the LBRY network anyway, if I have understood how it works correctly.
On which server though? Video files are big, they're not just "in the cloud", they must be hosted somewhere. So either they go bust and someone else still has the videos and shares them, or not.
A free software to take back control of your videos
Peertube is an open, federated alternative to Youtube without advertising or tracking. On this site, you can find a good Peertube instance, with good rules, good moderation and most importantly a friendly community.