This older man was suspicious of his wife's relationship with another man. In the video, she plainly states that he's just a friend of hers, although he seems convinced that their relationship goes far beyond platonic friendship. From the perspective of the video, there's no way to really tell.
One thing that's clear, however, is that the man didn't think through his plan of action very well. His accusations and peacocking behavior quickly lead to a physical confrontation... in which he does not excel.
WARNING: This video contains profane language and a violent encounter.