Adrien Broner may be done in by instant replay -- 'cause police say they have video from the alleged violent robbery outside of a Cincinnati bowling alley that could sink the boxer.
TMZ Sports has confirmed ... officials have video from outside of the Cincinnati bowling alley -- which they believe will help prove Broner beat up and robbed a man with a gun on January 21st.
Sources connected to the case tell us the video is grainy and dark and you can't see any fighting -- you CAN hear a voice that sounds like Broner demanding, "Give me my money back."
We're told you can also hear people imploring Broner -- "A.B. chill ... A.B. c'mon!"
Broner has been charged with felonious assault and robbery -- and faces serious prison time if convicted.
So far, Broner has not issued a comment on the situation.