Do you think SMIDSY would have helped this rider? It looks like he only had 100 feet or less from the line.
No, the weave would not have helped. Its value is in making your motorcycle recognizable to a driver who has a clear view and is looking for threats, but doesn't identify you as one. That can happen when moving straight up the line of sight. A motorcycle, a small visual target anyway, then looks like a stationary object among many others in his visual field. The weave makes it stand out as a moving vehicle.
In addition, the weave is not appropriate that close. You do it when you're far enough out that the threat isn't yet imminent. If you're seen, good. But you still need to prepare for an incursion and be ready to brake or swerve if the vehicle does pull out. When you reach a point where you might need to take evasive action, you can't be spending any of your attention--or tire grip--trying to make yourself seen.
What could you do differently in this scenario?
To avoid this kind of crash, first recognize the danger of the blind spot created by the minivan ahead of you waiting to turn left. If there's a threat beyond, you can't see it and it can't see you.
As you overtake on the right, the front of the minivan is what I call a "point of sudden exposure." Alongside, you're protected on the left by its presence. But as you pull ahead, you are suddenly in open space and vulnerable to a crossing vehicle--in this case, the oncoming left-turner. I suggest:
When you spot a point of sudden exposure, go to yellow alert: slow down and approach cautiously. This is a critical reaction to avoid a crash with an unseen vehicle. Your view to potential threats is screened, and you're nearing a point where you have no parallel lane of blocking vehicles.
Slow down and cover the brake, so you can come to a complete stop if a threat appears. And a left-turner is just one possibility. Another post in this thread describes a crash where the threat was a pedestrian crossing in front of the stopped vehicle as the rider passed.
I have been looking both ways before I start from a red-to-green light at intersections (or even when I am riding along where people make various turns onto my street (especially the 29/Sonoma Blvd. in Vallejo). Just because a light is green doesn't mean it's 100% safe to go.
Another bad area where people run lights is 5th street in Oakland along the Nimitz freeway. I always look for red light runners there.
Good awareness of those situations!