Your package is using at least one MP4 file as a background, so not everything has been run through the video coder.
The file is Tweets_BGD_3.mp4.
Also, your project itself is build at 23.976 PSF format, not 1080i 29.97.
If you open the Tools->debug->video cache and play back your scenes you will see what videos they are using and how quickly (or slowly in your case) they are being decoded.
#XPression