Hi FairfaxMom,
I talked with Shawn today and I asked him about the video he used to have because I remembered watching it some time ago. He said that it was somehow “removed” in the process of the changes they have been working on with their website but the good news is that by the beginning of August the new site will be up and it will include lots of updated information, videos, and pictures so this problem should be solved.
The box spring will certainly make a difference in motion if it has “active” springs. I wrote an amalgamated post today here about foundation options which may help.
Thanks for the ongoing feedback 
Phoenix