A disturbing video posted to YouTube last week shows a man climb on top of an intoxicated and unconscious woman lying on the street in Las Vegas.

The man can be seen kissing the unknown woman as she lies still on the sidewalk with her eyes closed.

He slides his hand underneath her head to support it, as she is clearly intoxicated and has little control over the situation.

Her head is lying inches from the road and there is a bottle of alcohol next to her, reports the Metro.

The assault goes on for several minutes as bystanders laugh and watch. Several people even start to record the incident on their phones but many people walk around the couple as if their behaviour is completely normal.

At one point, a woman approaches the pair and appears to ask the woman if she is OK before walking away.

Later in the video, another individual walks up to them before dropping the woman’s purse next to her.

At one point, someone kicks the man’s backside to get his attention but no one appears to intervene and stop the attack.

It is not clear whether or not the couple know one another. The video has been viewed thousands of times on YouTube with many expressing their disgust at the footage.

One viewer wrote: ‘Why in the hell didn’t you do anything or call the police? That’s straight up sexual assault!’

And another said: ‘This is disgusting. That dude is molesting that girl plain and simple.’ Eventually, the man straddles the woman and laughs as he glances up at a group of men cheering him on.

The video ends with the man continuing to hover over the woman while kissing her face.