I can speak to this directly as a pilot who put many hours into the logbook flying fair rides in an R44 this past summer.
Clearly this guy gave
some thought to an engine out problem, and
some thought to noise abatement, but probably not enough thought to either. Both are serious issues that need to be respected in this game. He does fly over roadways and parking lots to apparently attempt to satisfy both issues. But, it appears the ride was 2 minutes for $20. At that price point you are a) on the "backside of the earning curve" i.e. you are spending too much time on the ground and b) it forces you to stay low and tight. $30 for 4-5 minutes is a much better "sweet spot". You can still bang out around $750 worth of loads an hour (gross, assumes a 2.5 load factor and 10 loads an hour) but operating tempo is greatly reduced which enhances safety, and you have the ability to fly higher and take more care with respect to your flight path and noise footprint. So IMHO it was too low.
As for how confined the spot was, that place was relatively easy compared to some. The biggest issue here is that American fair-goers are all SUPER-sized. And fairs attract these people like flies because of such fair staples as fried dough, chili dogs, and all kinds of other crap. You post a weight limit of 250 (although the POH limit is 300lb) because you know some folks will lie, you run with less than half tanks max., and if you get too big a load you split it up. Finally, you pick up, do a power check, and, if necessary put it back down and kick somebody out. It doesn't happen that often, but it does happen, and not everybody leaves happy, but they are alive. As a lightweight myself, when I get down to a quarter on the main and zero in the aux., just a couple of loads before it's time to fuel, that's when you get called out to take a heavy load. I've never done any high altitude training, but I suspect some of the same technique carries over. FWIW the ship in the video appeared to have about a quarter in the main and aux. each, but it was hard to see.
Finally there is ground safety. Almost everyone does this too casually for me. That said, if you put one person each side as a tail rotor guard/people catcher, it does only take one person to escort the new load out and the old load back. Then the catchers load up the ship, make sure everyone is belted in and doors are closed. In the video in question I see exactly one ground person, which is not enough. And then there are the little kids, mentally challenged individuals young and old, and the drunks, most of whom you don't want in the front seat, and some of whom you don't want on the helicopter at all. You hope the ground staff is sorting this stuff out for you, and mostly they do, but every once in a while somebody slips through the cracks.
As for "stunting", steep turns are always fun but you need to read your audience and you need to watch that blade slap. Happy sounds, not frightened sounds, are what you shoot for, and I always adjust my ride by chatting up the pax in the first minute and making a few maneuvers to test the waters. Plus if you are over population there's only so much of this you really want to subject the ground to from both a sound footprint and
PR perspective. I've done events where nearly every ride had a few steep turns, and I've done events where nearly every ride was limousine smooth. It all depends on the audience and the venue.
I could wax poetic about this for a long time. It's an interesting and challenging operating area, with many nuances and subtleties, seriously. To be done safely and profitably you need to bring your "A" game, and it needs to be "safety first, fun second, profit third".