First of all, the video is an ad--it's marketing. If you want to say that marketing is propaganda, I suppose that's hard to argue against. However, there's really nothing in it that hints at political ends. Dissecting it in search of a political/legal motive seems unwarranted.
That said, to address your comments:
1. The video isn't saying that the 9mm is bad, only that it wasn't originally designed for civilian self-defense.
2. The video says nothing about "assault pistols" or "weapons of war" nor is it focusing only in the military use of the cartridges they want the 30 Super to compete with. They comment about LE use of other cartridges too--the point of the video is clearly to play up the fact that this cartridge was a ground-up civilian self-defense cartridge. Just like one would expect any advertisement to play up what the makers consider the strength of the product to be.
3. if the focus were really trying to get away from the 9mm because it's a military cartridge, there's no need to come up with a new cartridge to do that. The 9x21 already exists and will work in any 9x19mm pistol with just a barrel switch--or even after the existing barrel's chamber is reamed a bit longer. It was designed for use in countries that specifically ban military cartridge use. And we already have other self-defense cartridges that couldn't be said to be developed for military purposes that aren't in common LE or military use that would fill the bill.
4. The idea that a push towards legally limiting the use of the most popular centerfire handgun cartridge in the U.S. would come from ammunition manufacturers seems a bit far-fetched. Actually, it seems a LOT far-fetched. In fact, "a LOT" doesn't quite fit. Maybe astronomically far-fetched?