Alrighty, I finally got to watch the vid last night (:em

I reckon it's a pretty good demonstration of lane claiming. The rear rider took a slightly more kerbward position than the front one, and that's where I'd normally favour, but the difference is negligible.

One question: Is that the most boring place to ride on the planet, or what?

I reckon it should be edited into several shorter clips showing normal lane travel, and left and right turns.

It's a good basic demonstration of the techniques, and I think the light traffic suits that intent. It might be an interesting addendum to show the same techniques in conditions where it isn't so easy for cars to move into the next lane to pass, to show how they work in less ideal conditions, but for showing the techniques, they are pretty sufficient.

One way you could solve the camera problem with showing proper shoulder checking, would be to take the camera off the front cyclist, and mount it rearward on the following bike, just to show a 'rear view mirror' view of how motorists behave. You don't really need to see the rear cyclist - the front one shows the techniques well enough.