He started his manoeuvre showing off by over revving his engine from the wrong side of the junction and failed to take each carriageway as an individual road. He failed to look left with any degree of time and accuracy as far as I can tell, and caused an oncoming car with full right of way to crash. That part is simple.
Exactly this.
The driver was clearly trying to amuse the onlookers with his exhaust pipes.
There are so many similar videos of people at car gatherings giving their cars a bit of welly for the crowds and then hitting something when they run out of talent.
