Rapfred wrote:

QUO VADIS was an MGM flick, hence the stock footage was at G.P.'s disposal.  But I've always wondered how our pal George got away with using snippets from Paramount's THE WAR OF THE WORLDS in Metro's THE TIME MACHINE. 



Shots from War of the Worlds also ended up in Earth Vs. The Flying Saucers, which was Columbia. I suspect they were just sold to a stock footage library and were available to anyone who could pay for them.