ancient FAA documentary
 

This 2-part flick is from 1974. It portrays the flight of a UAL DC-10 flight from LAX to IAD, showing how it progresses thorugh the NAS. It's a little slow and the picture quality is poor, but it still has some cool shots of the -10, as well as ATC equipment.

YouTube - FAA documentary: Flight 52 pt.1 of 2