(ABC NEWS) -- Police and FBI in Wisconsin are investigating a mysterious YouTube video that some believe could be connected to a local teenager who went missing seven years ago -- though police have not yet determined if the video is real or a hoax, according to Eric Roller, the chief of police in Antigo, Wisconsin.

In the nearly minute-long video -- called "Hi Walter! I got a new gf today!" -- a man talks into the camera, saying he met a girl at the mall and then took her back to his place. The video then shows a woman screaming on the floor in a dark bathroom. She appears to be bound.

The video was posted on Oct. 11, 2009, "but has recently gone viral, and many believe it is connected to our missing person Kayla Berg," said the police in Antigo, a town of 8,000 people about 200 miles north of Milwaukee.

Berg, who would now be 23 years old, vanished on Aug. 11, 2009, in Antigo, and her disappearance remains a mystery.

Her mother, Hope Sprenger, told ABC affiliate WAOW in Wisconsin that the young woman in the video sounded and looked like Berg.

"I thought it looked a lot like her," Sprenger said. "I pray to God it's not."

"The clothing could be a big possibility," she added. "We do believe she was wearing that type of shirt. We know she had jeans."

"It made me sick to my stomach," Sprenger said.

Roller said the police department was notified about the video this weekend. He said somebody found the disturbing video online and then researched missing females from that time. Berg "came up" in the search, and that individual shared the video with police, he said.

He told ABC News that police are trying to determine whether the video is real and to identify the people in the video. He said police have received a lot of tips.

According to Roller, in the seven years Berg has been missing, the police have followed every tip they have received about her disappearance.

"Every tip that we do get on Kayla we take seriously," Roller said. "One day we're going to have that one tip that's going to make that difference, and we are gonna find something."

The FBI has been assisting the Antigo Police with Kayla's case since 2009, and the Milwaukee field office said in a statement today that it continues to work with the police department as they "determine whether or not" the video "has anything to do with the disappearance of Kayla Berg."

Authorities ask anyone with information on the video's origin or the identities of the individuals to contact the Antigo Police Department.

ABC News' Courtney Condron and Mike Levine contributed to this report.