Playing videos within InDesign requires that you either use the Media panel or use the SWF Preview panel. Essentially, you're temporarily creating a SWF file which is being played. That's not what happens in presentation mode.
Thanks for the reply, Steve.
That sounds like I cannot play the videos while trying to do a presentation directly from within ID. I think you’re saying I have to exit presentation mode to play them.
Looks like I’m stuck with exporting an interactive PDF.