The Shellharbour park fight was posted online on November 13 last year, but because the video could have been filmed anytime in the months and weeks prior, Insp Pedersen said it was difficult to know whether anyone involved had been arrested or charged.

Checks for that date revealed no reports of a brawl in Shellharbour.

Police school and youth liaison officers work with young people on a range of issues, including the dangers of posting pictures and videos online.

They also advise young people who have video footage of fights to send it to the police in case an investigation is pending.

Insp Pedersen said he personally believed that video sharing sites such as YouTube should not allow people to post footage of fights.

"The people that moderate these sites should be vetting the information that is put on there, and anything like - youths in the street bashing people and school fights - that should just be taken off,'' he said.

"I don't see what they have to gain by allowing this stuff on internet sites, because all it is doing is promoting their bad behaviour or trying to embarrass the victim."