Well, there was the YF-12. (Though the model in question is not this two-seat variant which saw testing as an interceptor though was never fielded.)

https://en.wikipedia.org/wiki/Lockheed_YF-12

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

Yup, A-12 as the title of the Youtube video states.