Great video, but the reality is this: the government won't go door-to-door. They don't have to. All they have to do is ban them and wait.
You are now a criminal, and the gun you chose not to turn in for whatever reason can no longer be used without commiting a crime. Self-defense? You may have saved innocent lives but don't collect $200 and go straight to jail. You won't be able to buy any more ammo because that will be banned too... same with reloading components.
Even the worst kind of anti-gun liberal can have the ability to think. I had been arguing with a hardcore anti-gun liberal on youtube for what seemed like years because she posted a very anti-gun video. She used every stereotype and insult against me you can imagine. Then one day out of the blue she sent me a message apologizing to me and saying she went to a shooting range with her friend, and that I was right and she was wrong about guns and now she likes them! I couldn't believe it.