[QLab] new video betas

[Christopher Ashworth]

Thanks Michael and Leon,

Just to confirm, I'm seeing the "repeated last frame after a reset"  
and the "doesn't make it all the way to the end" glitches.  Working  
on a fix now.

I'm pleased that this is all we've found wrong so far.  With both me  
and lots of you pounding on it all day I haven't seen any crash logs  
yet.  So if we're down to a few smaller display glitches to fix, I  
think we're in good shape.

Thanks very much for your continued help, it makes a huge difference.

-C