If you want to know what they will do, just read my past statements.
1. They will ban the manufacture of high cap mags, but allow the sale of existing mags.
2. They will leave the assault weapon ban to the states and local governments, but they will impose a restriction on manufacturing.
Everything they do will concern "from here forward". There are millions of high cap mags in existence in the hands of private owners (thanks to the previous high cap mag ban). Those will increase and price and the market will be flooded with them. People who never owned one will now own an AR-15 style rifle and several extended magazines.
There will be no uprising, why? Because even the guy in the video (idiot) has decent means, and fat sheep don't break down fences to find greener pastures. It takes a lot to get people to risk their lives to prove a point, and right now that's all it is. It's still a partisan thing, very cyclical, it will subside.