The video, filmed by 15-year-old Brandon Brooks, shows a McKinney police officer throwing a teenage girl to the ground and sitting on her and drawing his gun on other teens at a pool party disturbance.
The officer, Cpl. Eric Casebolt, is now on leave while police investigate.
"He's just putting random black kids on the ground," Brooks said as he re-watched the video on Monday.
Brooks and his friend, Devin Shanklin, heard about the pool party on Twitter and never imagined that they'd see an officer draw his gun.
"At that point, my heart did drop and I was scared that someone was going to get shot and possibly killed, so I knew I had to keep on filming like, ‘cause…I got really scared when he pulled out his gun," said Brooks.
Things began to escalate when a fight broke out between the party promoter, a teen named Tatyana Rhodes, and an adult white woman.
According to several accounts, the fight was set off by derogatory comments to Rhodes from the adult.
"Like, telling her to go back to section 8 housing," said Brooks.
In an online interview, Rhodes says her 14-year-old friend defended her and it was the woman who made the first move.
It's still not clear who that woman is.
Police arrived after that fight ended.
Some residents say it's what you don't see on camera that may explain Cpl. Casebolt's response.
"They didn't see the kids running all over the place, not complying with the officers," said Brad Taylor, who lives near the pool. "They didn't see them cussing the police officers, becoming unruly to them."
Brooks says Casebolt's aggressive behavior and foul language were in stark contrast to other officers.
"I thought it was out of line compared to the other officers," said Brooks. "The other officers acted very professional."
Casebolt does not try to detain Brooks or Shanklin.
"I was like one of the few Caucasian people at the party, so I think it might have had something to do with racism," said Brooks.
Maurice Gray says his five kids were at the party with his wife. He doesn't see the officers' actions as racially motivated.
"I don't think it's race-related, you know…but there's been certain comments that have been said that's kind of racial tension," said Gray.
"I already had mixed feelings about police and cops and stuff like that," said Shanklin. "…That kind of changed my perspective, seeing it in real life for the first time.
Brooks says police still have not contacted him to make any sort of statement about his experience or the video.
FOX 4 was told on Monday that police would be releasing some sort of timeline of the day's events from the pool party. That has yet to come out.
There have been comments on Facebook from the Craig Ranch community about acts of vandalism the day after the pool party incident. However, police say they have no documentation of any reports of vandalism, so either it didn't happen or it wasn't reported to police.FOX 4 is on YouTube -- http://bit.ly/fox4subscribe