I agree with Michael, with ONE caveat - that there is the assumption that these fish have been in the tank for awhile, and not just dumped in there for the video (I'm also holding back approval because of that one thin bandit angel). I could tell a lot more about how those fish are doing if I could see them being fed.
We run into this issue in many threads here - people are aghast at some stocking density that is really only a degree higher than their own tanks - but something just affects their "sensibilities" and they cannot tolerate it.
I once tried to calculate the biomass of the world's oceans and compared it to its volume. It worked out to something like one 25 gram clownfish in a 20,000 gallon tank, or 0.00125 grams per gallon. I did a quick estimate on the fish listed in Kahuna's tagline above, and this person could easily have 1000 grams of fish in their 180 gallon, 5 grams per gallon, or 4000 times more crowded than the ocean! How do they know they are not mistreating their own fish? How can they determine that a density of say 9 grams per gallon is then too much (which is what I roughly estimate the second video to be at)?
Jay