Older vid I found lying about. It's not bad.
What often happens with the turning lane is you get some jerk who uses it to cut in line when he wants to go straight. But you often get the turning light before you get the proper green light. So if he's at the front he'll just sit there and wait for the proper green as he doesn't want to turn. And the people behind him will honk. That's what I thought was happening at first.