Your video gives me nausea.
• GoPro Hero 2 is not known for low light, so internally the software increases the sensors light sensitivity-- the downside, noise aka grain. That's what you're seeing.
• Your video is 4 minutes of what? I don't get it.
• Why did you speed it up? What's the point? Speed duration is for telling the viewer a great distance or time has passed.. looks like you're going in circles in a Lowe's parking lot.
• I use Premiere Pro CS6.