Several students at Florida Memorial University filmed Allied Barton security guards using a gun and sticks to intimidate students on Monday.
Students published the videos on the web and Wednesday a local TV station was broadcasting the images.
The videos show students standing close to a bathroom where at least five guards were holding a young man. About two dozen students feared the guards were beating him.
In frustration, a woman screamed: "Do something!" And a young man standing by the door replied: "They locked the door, what do you want me to do?"
Then an enraged guard abruptly opened the bathroom door and pushed a random student against the wall.
But the worst happened at minute 1:14, when another guard decided to pull out a gun and point it at the students.
New Times reported the student held in the bathroom was Emory Mitchell.
After the guards escorted him out of the bathroom, Miami Gardens Police officers arrested Mitchell and charged him with battery.
The incident remains under investigation.