Im after clarification on a copyright issue. A music documentary I edited is possibly going to be included with the accompanying album and uploaded to iTunes.
It features 10 seconds of a 1950's film 'The Man Who Cheated Himself' and is used at the beginning of a comedy skit we created.
I downloaded it from archive.org (The man who cheated himself : Jack M. Warner : Free Download & Streaming : Internet Archive) where it lists the film's copyright as Creative Commons Public Domain Mark 1.0 (Creative Commons — Public Domain Mark 1.0).
The way I understand it is that I am free to use it in the manner in which I have but I wanted to double check. Its currently not mentioned in the credits, should it be?