I'd really love if PeerTube could become a standard, but it needs a catalogue of back content, better discoverability, and most of all, to offer financial incentive to move over. As much as I hate to say it, I think something crypto backed like odysee/lbry is more likely to become major.
There's no payout for putting videos on peertube, and there's not enough audience to get sponsorships. If you really want to make peertube a success, that's where it has to start. No amount of technology will make people go from making some money to making none money.