With Update 3 for Articulate Studio '13, we introduced support for uncompressed MP4 videos in published output. This applies to the three most common MP4 profiles: baseline, main, and high.
To take advantage of the new "do not compress" feature:
Install the latest update for Studio '13 and reboot your computer.
- Delete the MP4 videos from your project.
Insert the MP4 videos again.
Mark the box for the video property Do not compress video at publish.
- Republish your project.