It seems there are a lot of assumptions being thrown out on this one. One thing is for sure, we don't know the full context of the situation, and we just have a particular time window of the event.
But, if I'm judging from the video alone, it's 95-5 in favour of the cyclist. Purely from the video, it seems like she is the one who started the confrontation. If the cyclist didn't feel it was safe for him to pull over to let her pass, then she can wait and he has no obligation to pull over. If I was cycling would I have pulled over/stopped onto the verge to let the car through? I don't know, it depends on the situation but all I can say if I prefer to do that than get a driver angry, even if I theoretically am in the right to continue cycling (it's not worth it). But I don't think any less of the cyclist for not doing that as I don't know the full context. That and the "youtube" comment account for my 5% blame on him. But even then he may have been saying the youtube comment in the belief this would protect him from her doing something rash, knowing she was on video and was being confrontational. And yes, he could have chosen to ignore her commentary, wished her a nice day* and probably that would have been the end of that.
There is no doubt she took the time in a much heavier vehicle to stop and freely point out in how arrogant the cyclist was. I think she used her phone to take a picture while driving. She took the time to pull over (in a bad place too, given there was a safer place to pull over right before where she pulled over) to confront. She called 999 for an extremely clear non-emergency situation. Yeah, that's where the 95% of blame comes from for me.
If we are purely judging just on the video, I'll be honest, I'm a bit disappointed with the victim blaming here. She really could have just gone on her way too.
*I'm sure all of us do that every time something like this happens, right?