MP4 video in Captivate 9 project doesn't play in RH2015 responsive HTML5 ouput

Hello,

I imported a Captivate 9 project that includes an MP4 video (created using Camtasia) into my help project in Robohelp 2015 and generated a responsive HTML5 output. The Captivate project plays in the output, but the video does not appear and does not play. The video plays just fine when I publish and play the Captivate project locally. At first, I just created the Captivate project in a folder on my desktop and imported it into my Robohelp project, and when that didn't work, I tried the following:

1. In my Robohelp project, (using Windows Explorer), I put a copy of the MP4 in the following folder:
   1. Implementation and quick start guides
2. I created a responsive project in Captivate with, among other content, the aforementioned MP4 video, inserted into one of the slides. (Video > Insert >browsed to the Robohelp folder where the video resides).
3. From Robohelp, I imported the Captivate project into the same folder in which the MP4 resides. (see screen shot below)
4. When I generate responsive HTML5 output, the Captivate project works just fine in the output, except the video doesn’t show & doesn’t play.

Any help you can give is appreciated!

Dawn