The "Golden Aces" at the air show is actually footage of the Blue Angels, the U.S. Navy flight demonstration team.
The plane that crashes is a YF-23, but the video has been edited to show forward swept, instead of diamond shaped, wings. The YF-23 was designed for the Advanced Tactical Fighter (ATF) program for the USAF, not the Navy. It lost to the YF-22, which became the F-22 Raptor.