I have it also and have watched twice. I think I will try to watch this yearly, it's awe-inspiring and heart-breaking and so... human.
My Grandee was in the RNZAF during WWII, he was based in Canada mostly.
Also, I've always felt a close kinship with UK and Dominion soldiers. We did some training with a Canadian infantry unit. And one of my professors at West Point was an Officer from the British Regiment known as the Royal Green Jackets (he taught us small unit tactics: a good choice, the Brits have usually been pretty good at that). So I appreciate what your Grandfather did for all of us.
I always liked the story Churchill told of being woken after Pearl Harbor and being told of the attack and him saying, "Thank God. We've just won the war." Churchill always thought of the US as a large-grown daughter of England. I wouldn't go that far, but there is some truth to it.
Kelly