The cager was totally at fault, and "I don't care" negates any other "justification" he may have had. But....
Those riders are of the type making the rest of us look bad. Clearly, the dude with the camera was totally breaking the speed limit to catch up with his friends, and when he did, they decided to take off. There was clearly places where there was passing zones, and just a little patience would have netted a situation where the riders were breaking no laws. On the other hand, even if they were in a passing zone, I believe the cager would have still done what he did. My guess is that because of the double yellow line, the asshat driver somehow felt justified in doing what he did. He might have thought differently if it was a passing zone.
There's a time and place for everything. When the camera dude was catching up was that time and place. Speed can be "allowed" where there is no other traffic.