link doesn't work but I'm assuming it's the same vid that's gets brought up every once in a while on here. A bunch of trout getting dumped out of a passing by airplane? I too have the same question though, seems like that should kill the fish.
many years ago I saw a stocking by air, and as far as we could tell they all lived, at least we didn't see any floaters. we fished all around the lake and had to quit as you caught a fish on every cast after a while