VLC for Android Beta — VLC media player is a free and
open source cross-platform
multimedia player that plays most
multimedia files as well as discs, devices, and network streaming protocols.
Another good example is Sony's mail client which
opens messages in the top screen while locating folders in the bottom screen, while
multimedia files are shown on the bottom and content on the top (video can expand across both screens but the screen layout isn't really optimised for this).