The model in the video look more like an A-12 (earlier CIA version of the SR-71) to me. They flew with bare metal and black leading edges and were single seat.

The model in the video look more like an A-12 (earlier CIA version of the SR-71) to me. They flew with bare metal and black leading edges and were single seat. The YF-12A looked different, the chines didn't extend all the way to the nose and had a ventral fin