I know this is asked a lot but the answers i found haven't worked. I recently made a speech on a different laptop using blender 2.78 and then i sent the file to myself in an email and downloaded it onto my macbook pro. But for some reason when i try and watch the video in blender nothing is appearing. I've been trying to rebuild the proxies and everything else but nothing is working. I have audio in it as well that's not playing. Any suggestions?