Tim Tucker, Pat Cox and Co would be pretty unimpressed with the operator.
There were a bunch of violations in that skit. As far as instability goes, not so much, for the control of the helicopter, but it was way outside of the H-V curve for a lot of the operation. The pick up into low-level yawed flight is stupid and reckless, and contact of the skid with rotation or translation would have caused a dynamic rollover. the low fly over the head of the witnesses/prospective victims was dangerous. The touchdown in the pond was reckless, risking a dynamic rollover. The torque turn was insipid, the pedal turn was modest. The first sideways flight other than being stupid was not risking LTE, but the next one was. Pirouettes in translating flight are fun to do, but doing them incurs a risk if the noise stops, and doing it over the head of potential victims is reckless.
That video will almost certainly end up at Torrance on the safety course, and I would hope that the pilot is grounded, and the insurer voids insurance of the hull and CSL/3rd party until the operator lifts his selection criteria to remove reckless pilots.
The loads on the helicopter are actually quite low, nothing that was done there imposed high torque link, bending or torsional loads, but the pedal turn at high speed can start to reduce teeter clearances on the TR.
Forrest Gump: "Stupid is as stupid does"
Re insurer: RHC offered their own insurance,?PATHFINDER? It is a long time since I looked at that. They would be less than pleased with reckless operations.