Sorry, I don't see anything wrong with crossing a road even 1/4 second AFTER a vehicle passes. I saw the same video and was slightly (very slightly) bothered that the rider didn't seem to slow down as he came to the crossing. But then I figured that there were good sight lines and he could see that the way was clear.
As I've posed here before, I just about ignore all the traffic laws and adhere to the basic rules of the road that have existed for over a century. So, red light, stop sign or nothing, I check for traffic and proceed when I can do so safely without needing anyone to make any adjustment on my behalf.
By the same token, I don't assume having a green will magically keep me safe. Green or no, I check cross traffic and go if/when it's safe.
My basic rule for intersections is that I not only ride so I won't get hit, I ride so they couldn't hit me if they tried. That's kept me safe for over half a century.
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WARNING, I'm from New York. Thin skinned people should maintain safe distance.