Authorities say Victoria Lindsay was attacked on March 30 by six teenage girls when she arrived at a friend's home.
One of the girls is alleged to have knocked the 16-year-old victim into unconsciousness.
In a video clip released by the Polk County Sheriff's Office, the teens can be seen hitting Lindsay.
The sheriff's office says after the attack, three of the teens forced her into a vehicle and drove her to another location, where she was told she would be given a worse beating if she called police.
The girl's father says the teens intended to post the video on the video-sharing Web site YouTube.
Authorities say 7 of the teens remain in juvenile detention. A boy charged as an adult is free on bail.
