I just saw the entire video. This is just my humble opinion. Perhaps I'm 'kia-see' (faint-hearted).
I've seen some bad-ass drivers who will actually bang a rider on purpose. Seen it with my own eyes. Car drivers have less fear as they have a lower risk of getting hurt in an accident. It's just not worth the while getting into an accident with a creep like this.
In many occasions, it's not whether we are road hogging or not. The thing that really matters is the driver's emotion at that time on the road. He looks hot-headed judging from the way he tails you. When a driver is hot-headed, he can do anything and that's not going to be good for us riders.
So the 'kia-see' rider like me would move to the left. I saw a few good opportunities to move to the left other than the option of lane-splitting.
Here are some of the early opportunities that the 'kia-see' rider would seize:
1. At about 00:28, the taxi was moving to the left lane which gives you a lot of space to move to the left.
2. At about 01:09, after passing that MPV, another big pocket of space.
3. At 01:19, after that yellow taxi moved to the left, an even bigger pocket of space