What do you think about the rest of his tips?
Balls of feet on footpegs, not arch.
Two fingers on clutch, one finger on brake. Depends on your hand and your bike. Always use what you would need for
maximum braking, because you don't want to reposition your hand if a low-decel situation suddenly turns into an oh-shit situation.
Cover brakes in traffic. Harry Hurt recommended this 40 years ago, and it's still good advice.
At least 5mph faster than the flow.
High beams. Daytime only in traffic, of course.
Watch for gaps when splitting. The lane-change cut-off is the most common kind of lane-splitting crash.
Courtesy wave for drivers who make room when you're splitting.
Lane position to maximize view to traffic ahead. He emphasizes ability to see debris in the road, but a more important consideration is to be able to anticipate traffic events.
Check for red-light runners before entering intersection on fresh green.
Always wear earplugs. Meh.
Carry a tire plug kit.
Watch for critters. Not high priority when commuting in Irvine during rush hour.
Lateral space cushion from adjacent lane. In the video, he raises this when he's in the #2 lane of 2, and the #1 is occupied. There have been arguments on BARF about this, though the context is usually mirror image--rider in #1. Enchanter and I (and others) have taken this position while some have argued for a position tight alongside the occupied lane, better to be seen in drivers' mirrors.
Use both brakes in traffic.
Be careful on painted lines.
Get braking done BEFORE turning at an intersection.