If the pilot is licenced, current and confident to conduct aerobatics / adventure flights, and the aircraft is licenced to conduct aerobatics / adventure flights, then I don't understand the drama. In the top video, I can't see whether or not the passenger in the rear on the left is wearing a seatbelt but apart from that, if the operation was licenced and current, then what regs have been broken?? I am assuming that seatbelts should be worn during aerobatics / adventure flight manouvres?
If they are not licenced to do aerobatics with passengers then that is a different kettle of fish entirely.....
NOTE - I don't have an aerobatics rating..