I work on https://lbry.tv and the desktop app and am just curious.
Just haven't gotten to it yet. We're a pretty small team right now.
Additionally, PeerTube is also compatible with the wider fediverse through the usage of the ActivityPub protocol, meaning that channels can be followed via a dozen or so other platforms that all speak the same federation language. Theoretically, it would be possible to write an entirely new project from scratch (in a completely different language even) that's capable of federating videos with existing PeerTube installations.
This is not to say that there's anything specifically "wrong" with LBRY, just that one approach already integrates with a broader set of platforms due to what community it was developed out of.
Anyone can build an app that interacts with the LBRY network through the lbry-sdk (https://github.com/lbryio/lbry-sdk). To be fair though, our company is the only one working on apps atm. But you could build one in any language you want.
My feature wishlist would be if you can have paid videos or reasonable user access control and an API, set up some sort of shop to sell merch, and have course style organization. I use playlists for organization on YT, but it could be better. YT has a lot of that stuff, but you need to have a shit ton of subs or view hours to get access to it, so I don't have access to it.
I'll give it a shot. If you want to get in touch with me, email and Twitter in profile. I'll probably have more feedback in a month when I'm back to my recording setup and actually upload something.