Did you watch the video?
That might be a locked solid release bearing dragging on the fingers, but he says it never made a sound before the starter was replaced.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.