I saw earlier in this lecture your first idea of putting a buckle on the boot strap, so my buckle was pretty much what I remembered from that glimpse. It turns out I was correct when I finished the lecture. The only thing now is that I have two boots (they are mirrored) and only a buckle on the original boot. Maybe that is correct or maybe it has something wrong. I will have to see in the coming lectures.
Here is my boot buckle:
