This is an absolutely great documentary on the Joint Strike Fighter flight-test phase between Lockheed Martin's X-35 and Boeing's X-32. It is quite old, but apparently, many here have not seen it.
Just one thing, the JSF program was not a fly-off
. The Flight Test phase was one of the many phases during the design of the JSF competition, and its primary objective was risk reduction and technology demonstration. That said, the flight-test phase was probably the most important part of the design phase.
This is an absolutely brilliant watch if you're an engineer or an aerospace enthusiast of any kind.