I don’t know enough about this video to tell you how the girl died, but at 2:08 a beat up motorcycle is shown in the video, which could mean that it’s the motorcycle that belonged to the victim. Since this is Thailand, a possibility exists that the girl was shot dead – given that she’s bleeding from her head as if she was shot – but then why would the motorcycle look like something big and heavy ran over it?
I tend to think she’s a victim of a traffic accident. She was not wearing a safety helmet – which is not unusual in South East Asia, got hit by a truck and fractured her skull falling onto the concrete. That’s my theory.
It’s also fair to assume that the girl was a prostitute. For one, you’d be hard pressed finding a Thai girl who doesn’t whore herself out for money, but she also looks to be dressed rather invitingly – there’s a good shot of it at around the 3:57 minute mark.