The father of Geelong midfielder Tanner Bruhn has been filmed barking like a dog in his underwear, allegedly while admitting he owes money to bikies.

In the disturbing footage, 51-year-old bankrupt tradie Matthew Bruhn can be seen on his hands and knees as voices off-camera demand he keep barking.

WATCH THE VIDEO ABOVE: Geelong star’s father filmed in bizarre bikie video

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When asked who he owes money to, Bruhn is filmed responding with “Gaz” from the “Hells Angels”.

Bruhn has strongly denied the claims, insisting the video was just a joke made with friends.

Victoria Police has confirmed they are investigating the incident.

The footage has raised serious questions about the circumstances surrounding the video and whether any criminal activity took place.