Ok... I was bored so I actually watched the video. The fool in this clip is breaking two very important rules of firearm safety.
1. Leave the safety on until you're ready to shoot.
2. Do not put your finger on the trigger until you intend to pull it.
However, this still gives no justification for your branding all legal gun owners as irresponsible rednecks. I have plenty of video clips that could support labeling teenagers as irresponsible, stupid, and negligent. But as everyone knows just because some of them fit this mold does not mean they all do.