I'm not a big fan of lane-taking - I only do it when 1) I'm going the same speed as traffic OR 2) Parked cars exist.
As for the video:
1. (parked cars) - I would ride the same way
2. (wide lane) - I would be further to the right
3. (freeway ramp) - I would be in the right tire track of the thru lane, though I wouldn't move there until the lanes have appeared.
4. (left turns) - I'd move over maybe a few dozen feet in advance of the turn lane.