Of course they would say that.
You can clearly see the restaurant wasn't open by the way the sliding doors were being pushed open (0:06), and a "fermé" sign on the door (meaning "closed") at 0:16. No employees visible anywhere.
To get away from the gas, why not run down the road the camera man was chased down by the cop? No gas there, no resistance from police and much easier than breaking & entering a restaurant.
In fact if you look on a map, the location of that BK is on a roundabout with no less than 10 roads branching off it.
But yes, those are my guesses based on the information available and I may be wrong.