I'm hoping to import a quicktime or flash movie with an alpha channel, in hopes that the stage image will not be obscured. This is assuming that a movie can play in on the stage without being framed as a MIAW. Is this possible?
You're not going to get an alpha channel in a QuickTime movie, and if you turn off DTS and try to apply an ink, you'll again be dissatisfied. I'm less sure about Flash movies, but suspect it will depend on how they're imported/played. You certainly have a better chance with Flash.
I am unsure where your MIAW reference has any relevance, but assuming this is what you're asking: yes - a video can play on the stage, it doesn't have to be played in a MIAW.
That frees me up to proceed.