Rubygirl, you really need to watch the video again. You're completely missing several steps.
Cesar puts the bowl of food down and looms over the dog as though challenging her to eat. The dog looks at the food but isn't sure she wants to eat while this dude is looming over here. But she likes food so she decides to go ahead and eat. He then reaches in to try and take the food, she growls and air snaps. He PUNCHES HER IN THE FACE and she air snaps again, but she RETREATS FROM THE FOOD. She walks BACKWARDS. Then he PURSUES HER ANYWAY.
In your (ridiculous) example, the wife would try to grab the remote and the husband would give a warning, and she would smack him in the face, and the husband would get up and walk away and his wife would keep coming at him, remote now across the room where they had left it. This is no longer even about resource guarding - this is about the wife (CM) being an aggressor and chasing her husband (the dog) down apparently with full intention to start a fight.
If somebody got in my face and was screaming and I warned them to back off, and they continued to pursue me, and I slugged them... and they CONTINUED to pursue me after that, you can bet my response would be full on punch and punch and punch again. From a biological point of view it IS actually completely normal. Fight or flight. The dog tried to flee and got chased and provoked again! The second time he reached for her, with the same hand he just punched her with, she fought. He had to kick her off - and then he STILL pursued her, even to the point of backing her up into a corner where the dog couldn't even flee anymore.
Notice, however, when the dog is cornered, she doesn't just lash out as he continues to stand over her in what appears to still be a threatening position. She gives calming signals, she's trying to defuse the situation.
The video stardogs linked is fabulous.