The series of videos, called Scarborough Jackass, feature teenagers whipping and hitting each other, and jumping into bushes.

One of the stunts, which is believed to be fake, involves an innocent passer-by being attacked in a "Happy Slapping" style incident.

The victim is seen to fall immediately in the middle of the road.

A North Yorkshire Police spokesman said: "Having viewed this particular piece of footage and putting it in context with the other video clips posted by this group, it has all the hallmarks of being a deliberate stunt with the apparent victim in on the act.

"However, if anyone has information that suggests this was actually an unprovoked assault on an innocent passer-by, then it must be reported to the police immediately.

"While this type behaviour appears to be a 'good laugh' to those involved, the participants must be mindful that their actions could cause fear and alarm to other members of the public who are not 'in on the joke'.

"Also, on a general point of health and safety, the type of stunts and deliberate acts of pain involved in these clips could result in serious injury and even loss of life if something went badly wrong.

"It also sets a poor example to the younger generation who could mimic the stunts and put themselves and their friends in danger as a consequence. For these reasons, it goes without saying that the police discourages this type of activity."