Apparently Connors was on his way to American video game developer Brianna Wu's house when he flipped his mum's Prius.
Connor is not the most stable of people. His Youtube Channel talks about sending a friend to Israel on a mission to save Tupac Shakur, who was murdered in 1996.
However he is in contact with #gamergate big names King of Pol and Ralph Retort and it is pretty clear that you do not pop around to someone's house with a gun unless you mean to do something with it. He was also calling for other #gamergate fans to join him at Wu's as he drove – which was probably why he crashed.
Of course Connor blames Wu for tampering with his mother's car and trying to kill him so we suspect he will be taking the train to Wu's place. As of 2pm Saturday Brianna Wu said she was in contact with law enforcement about an unstable gunman currently threatening (and acting) to kill her.
Of course there is a fair bit of evidence in the video.