Apparently something of a viral hit when it was released online some years ago now – being a bit out of touch with such things I didn't see it until very recently. You can see why it was popular because it is very short, is unusual and is the sort of thing that makes for easy viewing on the move because it is light, short and quite fun. The plot sees a best man lending support to his nervous friend the groom; the groom is sweating with nerves – a situation which is going to get worse before it gets better (if it gets better).
The joke is simple – the sweat gets worse to the point where it pours from everywhere and it appears ultimately that limbs collapse into water as the groom disappears in projected sweat and desperate cries a la those seen in war movies where one tells the other "hang in there man, you'll make it" etc. It is very short indeed and the impact of the silliness and the straight-playing of the two men make it grab you and work for the 60 seconds it has to. Once it loses that first impact it has though, it isn't quite as funny although it is amusing. As a throwaway clip to share it made me chuckle and I can understand why it must have been retweeted, reddited, facebooked and all other places because it is a quick, sharp hit and out. Looking for more than that will leave you disappointed but this silly little clip is good enough to amuse and entertain for its short stay.