There seem to be two schools of thought on this one - move out and 'own' the road & and ease off and let him pass.
Matthew, I take it your camera is in a fixed position on your bike. Do you have a neck problem or a hearing problem? The reason why I ask is that looking at the video, the first indication of a car is when it is alongside you. You also appear to move to your right slightly as you approach the pinch point as if you were undecided about your position; now if you did move further out without a shoulder check then i would not be replying to your post, indeed, you would not have been in any position to post it.
What would I have done? In that incidence, more shoulder checks, eased off and moved slightly to my left and let the car pass. I can already see fingers poised over keyboards to ask me why I am surrendering to the motorist and letting him get away with his bullying tactics. I enjoy cycling and have done for over 50 years and hopefully I have more years left in me but I want to keep my body intact and my blood inside it so my safety is of paramount importance. .It is not called surrender, it is called co-operation.
Matthew, there is a lot of advice on internet forums, some good and some bad; you will have to learn to separate the two.