Agreed with emg, fish don't even feel pain like we do. Besides the beginning of the video looks like the intro to a foreign fishing show, so they were probably out night fishing when this happened and were just enjoying the comidy of it. I have seen schoools of shad boil the surface and jump out when they are being coralled by a large predator underneith, I usually catch something without fail after trolling through the baitfish school. The video though looks like more that just a school of baitfish, they are pretty big for baitfish(unless they have sharks in that river) and it seems to be happening to the whole river.
z71silverado: please let us know if you find out what they are saying, and what it sounds like the circumstances are.