To be fair, by having two accidents I the space of 16 months, you sound like a terrible driver even tho the accidents wasn't your fault. Every time you get in the car you are at risk. Every time you wake up in the morning, you are at risk. Hust because your son is in the back doesn't mean you should be over cautioned, or pull out slower in junctions. Pull out at you would normally. People do not think quick enough when driving, that you are pulling out slowly because you have a child in the back, infact, it would infuriate people more that you are pulling out slowly. This doesn't excuse the terrible behaviour from Tom the Audi driver.
No doubt there were other spaces available, you can clearly see one opposite the car in question, I would suggest (and this will come across as savage) you are just jealous that someone can afford nice things and probably has a better life, rather than being stuck with a kid who will burden you for the rest of your life and then be a burden to others when you are gone
So, WG07 UTF. You claimed to "know the cyclist" and stated their "life was in danger". Let me tell you something. The world is watching this video, of a public place, with you in it. That probably includes the police and every upstanding citizen. So if you do anything, know the world is probably watching YOU doing it - ain't democracy great.
What an ass! Crappy car too!