We're told the video was shot months before the May 21 incident in which Amber claims Johnny struck her.
Amber asks Johnny if he drank a bottle of wine and tries to calm him down. She says she was sorry for something although she was not specific.
Johnny isn't having it, and appears out of control. After throwing the glass and bottle, you see him swiping at Amber's phone ... trying to get it from her.
Sources connected with Johnny tell TMZ ... the video is "heavily edited" and there are portions where Amber is seen smiling and egging him on. The sources add the video was a complete set up by Amber.
It's also likely the tape would not be admissible in court, partly because it's edited but more importantly because it appears he does not know he's being videotaped and she'd have to get his permission. We've learned, however, the tape is specifically entered in an exhibit in Amber's case.