I agree that Beme may need a single-screen tutorial for those who have no prior exposure to its authenticity, but I don’t think your improvements are really improvements.
It’s a no-frills social network that works on minimal/no-UI. Adding UI elements undermines its original intention and makes it no different than other video-based networks out there.
Though, it will be interesting to see if people are into this new interaction. Things are certainly a bit too “composed” these days.