Cheers. I have been doing track days a fair while.
Not quite sure what you mean about the camera? It's firmly clamped to the roll bar.
The green Caterham was not watching his mirrors properly and should have moved over sooner. You should check your mirrors (at least) after every corner & if you see a car close behind that wasn't there the corner before, it's faster & you should move over as soon as it's safe to do so.