Fix best video source logic
Fix best video source logic

Try to find an html5 video that the browser can play.  Otherwise, do with what
you got.

https://unisubs.sifterapp.com/issues/1670

eloquence/unisubs,ujdhesa/unisubs,ujdhesa/unisubs,ReachingOut/unisubs,norayr/unisubs,wevoice/wesub,ofer43211/unisubs,eloquence/unisubs,pculture/unisubs,pculture/unisubs,ReachingOut/unisubs,ofer43211/unisubs,norayr/unisubs,wevoice/wesub,norayr/unisubs,ReachingOut/unisubs,wevoice/wesub,wevoice/wesub,eloquence/unisubs,eloquence/unisubs,pculture/unisubs,ujdhesa/unisubs,ofer43211/unisubs,ReachingOut/unisubs,pculture/unisubs,ujdhesa/unisubs,norayr/unisubs,ofer43211/unisubs