The crowd gathered at midnight in Washington Boulevard and Maple Avenue.
It is not clear why the boxes of people converged at the southern intersection of the center of Los Angeles, but some were dressed for the party, with pink platform and cat heels, according to the video filmed by the news means uscene.tv. A man left a jug full of an flammable liquid that splashed a torch, throwing flames to the night sky.
When a helicopter surrounded above, a man who wore a leather jacket uploaded a light post, his feet perched on a street sign. He took out his phone and seemed to film him talking in the camera.

People are near a police cruise that was destroyed on Sunday morning.
The attention of the crowd went to a line train, which had stopped along its route in Washington Boulevard. According to the footage, the vandals inside the crowd began to paint the train and hammer in the windows.
The Los Angeles Police Department was alerted at 12:12 am on Sunday by a person who called that he said five suspects of men had entered a train car and were destroying the interior, said officer Kevin Terzes, a LAPD spokesperson.
The video showed LapD officers in a skirmish line on the other side of Mafia Street, grabbing black and green riot guns that shoot foam.
At 12:19 am, the LAPD received another call from “disruptive” people on a train in Washington Boulevard and Trinity Street, said Terzes.
The officer said that no one was arrested in relation to any of the calls. It was not clear, separately, the LAPD arrested anyone in the group that will be shown in the video that paints the facades of an Express Panda, Waba Grill, Dialysis Center and Medical Clinic.
Some in the crowd posed for selfies next to a LAPD cruiser painted with spray. They cursed the officers, threw an artificial fire and kicked the police car while the officers moved away, according to the video.
The train service was delayed about 20 minutes after about 50 people blocked trains to the south and north in Washington Boulevard and Maple Avenue at midnight, said Jose Ubaldo, a subway spokesman.
The vandals painted the exterior and interiors of the trains, but no passenger or subway employees was injured, Ubaldo Maid in a statement.
He asked that any person with information about the incident communicates with LAPD at (800) 222-8477.