So that camera that's on you?
Remember how we said that you shouldn't change a thing? Well....that isn't entirely true.
You probably should have picked up that cup with your other hand. You just totally blocked your face and the reaction to what she said.
Also, where you stopped to wait for the bus, there's no light, we can't see how your worried about your mother.
As much as you shouldn't change if the camera is on you, there are certain technical things that can't be denied.
You have to hit your mark. You have to be seen.
As much as you shouldn't be concerned with the camera, you need to be worried about the camera. It would suck to do your best work, but all we see is your back.
PS. This, of course, all applies to the stage as well. Though, the audience doesn't move while, the camera might, so hitting the autopilot on your audience awareness is more tricky.