Why don't we use PeerTube to host the videos for Lemmy/kbin?

Would sound stupid as I don't indepth of PeerTube yet but I have heard that PeerTube is federated video sharing platform. I also heard it can't hold much a load which makes sense as HD videos takes lots of load. That begs me the question why don't we use it for small/short videos(not those vertical videos) to build communities...