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Before you get too deeply into troubleshooting InDesign, it's possible that you either haven't placed the movie correctly, or you've exported it incorrectly, or you're trying to view it incorrectly.
1. The video should be MP4, H264 encoding. You can use Adobe Media Encoder to resave the movie if necessary.
2. Use File > Place. View it in the Media panel. Set poster and controller settings.
3. Preview it in either the EPUB Interactivity Preview panel or SWF Preview panel.
4. Export as Adobe PDF (Interactive).
5. View in either Adobe Acrobat or Adobe Reader. Other PDF viewers may not preview correctly.
Have you take all these steps?
Thanks Salah for the ideas...I did what you suggested, but it didn't work...
Any other ideas I could try?
I wrote a list of questions about how you created your movie and the PDF. Check it out.
I'm having the same problem. However, the video does play in acrobat, but it doesn't play when I send the pdf to a different computer. It only plays on my pc.
You have to tell us what PDF reader was on on the "different computer." Some PDF readers don't handle video well.
Acrobat and Adobe Reader. I'm not a newbie to working with InDesign or Acrobat. I've just not had to try and include video in InDesign and then send the resulting pdf to a different location. I know all the steps and what should work and what won't work. So thats why this is so frustrating, because it should work. I just feel like I'm missing something basic or an elusive step I'm overlooking.
Why don't you post the PDF file on a cloud site like Dropbox so we can download it and check it out.