I have created an Interactive PDF using Indesign CS6. It is a 43 page pdf with a video embedded on 5 of those pages. When the final PDF is played on a PC, the videos seems to play sluggishly after watching a previous video. It seems there is some sort of background process going on that hampers the playback, I'm wondering if this is a PDF issue?
You might as well ask this in the Acrobat forums. InDesign has absolutely nothing to do with the play of multimedia in Reader or Acrobat. It only is the agent for embedding the video.
However, if you set too high a resolution, bit rate, etc. when you created a video that would play a part.
The Rich Media & 3D Acrobat forum is probably the best place to ask: