Not sure who Richard is! That vdo is horrific but the scenario is interesting. It seems the girl has to be a Thai (or Lao according to the comments below) with blonde hair and that she is from a club as two other girls also with long blonde hair are seen on the extreme right disappearing back inside when the attack starts. The two she is chatting to as the attack starts also slink away. Hard to make out if they are both men. Then there is the fact that even once the girl has hit the ground and the really heavy stuff starts, the other Thais all just amble away.
It almost appears that either an attack on this girl was expected or some form of similar attack is a regular occurrence outside this club. The comments suggest the main attacker was her regular customer and is actually married to a lady with royal connections. That being the case, anyone prepared to lay bets that he will be prosecuted for anything?