If you pause the vid at 1 second (and all other frames that are within the 1 second if you have a steady enough hand), you can see the rear left tyre that was removed has been left sitting in front of his rear left wheel as he is about to pull away.
If you rewatch over and over and over again as I just have while typing this reply, the story gets even worse.
If you pay extremely close attention to the very second Lewis' car moves forward even a few inches, the badly placed tyre immediately flinches, gets rolled over and flips Lewis' rear up at exactly the same moment.
If anything, it suggests the old tyre might even have been left literally resting on his new one.......just look at how far away the removed front left tyre is in comparison to the rear.
You cant even complain about the wheel gun man this time. It just happens to be the case that in this race, the guy who takes off the tyres forgot he's not supposed to drop it in the path of the car as it exits.
As far as his mentality goes, I guess he can only ever come out of this as a stronger person. It probably also helps that the mistakes being made are so blatant and so embarassing that all he has to do is do his job and to be quite honest, he's been quite faultless.
I'm sure he's feeling it inside though. Cameras don't lie, but they never tell the full story either.