It's also possible that the one that did it said "why did you do that" to try and shift blame for reason(s) of insurance payout, shame, or something else and the one that said "I didn't" is telling the truth.
Whichever one did it, that video from Captain Steeeve makes a pretty good case that one of them did.
Fuck cars and up with cycling and bike infrastructure and all that but unless this study is more specific than the article states, it's useless. And if it is more specific this article may be misleading.
It just gives a percentage of "in compliance with traffic laws" and doesn't give a breakdown of what laws. Since most drivers speed at least a little quite often, and most cyclists are incapable of speeding anywhere near as much, what laws are the cyclists breaking to get them as low on compliance as drivers? If it's stop signs and red lights, that is right in line with the stereotype of them being dangerous scofflaws the article is saying this study shows is incorrect.