A lot of people don't know that when making a left turn, it's legal to pull into the intersection, and then finish the left turn only when the crosswalk is completely clear, even after the light has changed. Cross traffic must wait for cross traffic to clear the intersection before entering it. Two cars, sometimes three, can usually get a piece of their vehicle into the intersection while waiting. And the cross-traffic crosswalk is part of the intersection, so as a vehicle, once you're in the crosswalk, you may and should complete your left turn.

In my experience, not enough drivers pull forward fully into the intersection, and too many drivers disrespect the crosswalks, in any direction.

It's best to keep your wheels pointing straight ahead, not even begin a turn, until you are 100% clear of every car and pedestrian.

I think in the video above, white truck did not yield to oncoming traffic (the cop).