Nice video.

When I was riding a motorized two wheeler, I liked to move around in the lane to attract attention, rather than being a static object from the viewpoint of the drivers. On a bicycle, you usually have less ability to do this, but it is a good idea when possible. I think the helmet light is sort of a substitute, instead of weaving the whole bike, you weave (wave) your light, including across the driver's windshield. If you're 50 or 100 ft away and have a sane light (a few hundred lumens) you won't "blind" anyone.