Well I have heard of it Tink...being in my 75th year now, I was a few months old when all this was going on.
On Quora just a few days ago, I answered a question about whether the American population ever feared the Allies might lose WWII...and my post describing my memories from my parents was met with amazement. That you did not bake cakes because they used sugar; sugar was rationed, and people tried to use as little as possible so there could be more for the soldiers. Everyone grew Victory Gardens for personal use, so more food could go to the soldiers.
My youngest auntie was a WAC nurse in the South Pacific, I recall she was on Wake Island but I am not sure about Iwo Jima. When she and other soldiers came home on leave, the whole community got together to make sure the families had enough gas ration coupons and adequate tires, as rubber was rationed, to go pick up the soldiers and then give them a good time.
My father worked long overtime shifts as a logger, and then drove forty miles to the ocean to patrol against possible invasion. And, if someone was really fearful, they picked up and moved east of the Rocky Mountains because it was generally understood that if Japan invaded the mainland, the West Coast would not be defended. The US military would take its stand at the Rocky Mountains.
And then forever after with that generation, just a bit of disdain for those who abandoned the Pacific States for safety.
Your clip showed a re-enactment of the famous flag-raising, and the monument there...yes in my generation, no one forgets Iwo Jima.