Police are looking for a man who knocked out a woman during an argument captured on video at a Venice Beach market over the weekend, officials said.In the video, recorded by cameras at Windward Farms, a woman in a black shirt is seen in a terse exchange with a burly man in a tank top about 7:30 p.m. Sunday. The pair didn’t know each other personally but recognized each other from a disagreement earlier in the day, LAPD Sgt. John Marquez said.The argument sparked up again at the store, where one customer had to step between the two, the video showed. Eventually, the woman exited the store, but video shows she waited for the man to leave. Several people who saw the punch tried to stop the man, including one person who put him in a headlock and jumped on his back but ultimately was shaken loose.Detectives have identified the man and are looking for him, Marquez said. When caught, police say he will be booked on suspicion of felony battery.