There is now a new engine for playing media within your level’s environment, and can be applied to pretty much any surface. It is called the Media Framework and works with MediaPlayer assets in the content browser.
For more info on this new (UE4 version 4.5 or later), there is some preview documentation available here:
It is a brand new available in 4.5 so it may not be production ready, but should work in most cases, and will be improved in upcoming versions.
Hope that helps! 