[ossiblue]

My guess is the driver of the van that was scraped likely got the license number of the scraper, either at the light, or while catching up to him during the traffic flow--they were sitting there for a good 30 seconds waiting for the signal to change. You can see the scrapee move his van up during that 30 second wait. He was probably trying to clear the lane his ass-end was blocking, but he was close enough to read and record the license number.

Bottom line, I don't think your video would be critical to this situation though the scrapee would certainly like to have it, I'm sure. It's hard to tell how much damage, if any, was done to the scrapee that would warrant an insurance claim. The video doesn't show the scrapee's van being jolted or moved by contact and the part that may have made have contact appears to be the tip of the bumper. It looks like the scraper's van would have got the worst of any contact. Unless you witnessed/heard something that doesn't show on the video, the incident appears to be a very minor paint scrape on the victim's bumper that the insurance would not even cover due to the deductible. One could even argue, from the video alone, that the scraper didn't even realize he hit the other van, and it's not clear that there was a conversation between the two as they moved down the road.