Check these out!
http://www.americanaeroservices.com/videos.htm
Videos to make a radial engine lover's heart flutter! Very cool footage of startups, taxis, takeoffs, landings, and flybys of a few of the best known radial engined warbirds. Even a humorous carrier landing "crash" advertisement featuring an F4U.
F4U Corsair
B17G Flying Fortress
B25 Mitchell
B24 Liberator - Currently the only one in flyable condition. Pretty rare footage.
Hawker Sea Fury
Even a P-51 Mustang for the Merlin fans out there.
Enjoy!