Lots of times, funny safety announcements go viral. (Southwest comes to mind). These are usually craftily delivered by wonderful flight attendants.
The problem is that the are funny the first time - and really, really annoying after that.
I really like UA's video. But agree with other's that it is too long.
(I always wonder about the seen where the basket of fruit is being stored. Wonder how they will get that past inspection - assuming they are on an international flight!)