I believe that is a safe assumption to make. I cannot imagine that anyone who makes music videos could possibly be unaware of the Sledgehammer video. In fact, I cannot imagine anyone involved in filmmaking of any kind who would be unaware of the sledgehammer video. Like the Wikipedia article says, it's the most famous, most played, and most awarded music video ever made. A music video producer being unaware of Sledgehammer would be like a modern rock musician being unaware of The Beatles.

I'm sure they deliberately avoided mentioning it in the Making Of, possibly because they didn't want to step on any copyright toes.