We'd love to get some feedback and for you guys to crank our real time analytics up so we survive tonight's presentation.
It seems that you have backwards and forwards mixed up (at least with what I think they would do -- I imagine scrolling left to right as going forward rather than the reverse)
Also, you maybe want to put some explanation modals in the app (I'm guessing you're bootstrapped) -- Some color wouldn't kill you, and also you could get some icons.
Maybe you want to do some sort of interactive tracking of trending videos? I'm not sure if/how you're doing that now, but however you're measuring virality would probably be it.
Otherwise, not much else to say, it's got a pretty good (read: simple) UX, and does exactly what it sets out to do.