I can't tell what the guy is riding but even if it was something not allowed on the path, I don't think the woman should attempt to enforce the law (as she sees it). I would think the proper response, if she felt like confronting the man at all, would be to tell him she was going to report him, and then call the police. (I think she might (should) get in trouble for calling 911 to report someone on a pathway on an illegal vehicle though.) Even if she was right, her actions were wrong, in my opinion.
I agree, neither person comes off well in this video, but I'd have probably done more or less what the man did if I were in a similar circumstance, hopefully, a little less confrontationally. Maybe I'd have told her to call the cops if she thought I was doing something illegal.
Again, I couldn't tell what he was riding, but this kind of attitude about ebikes worries me. I haven't run into it where I ride, fortunately. At least not directly. I think some analog riders ride by me without nodding hello, or with their noses in the air, but that's the extent of what I've encountered. Oh yeah, one guy didn't want my help with his flat tire, I think because of the battery on my bike. <shrug>
TT