How well do videocameras do in below freezing temps?

I just got an HV20, filmed some turkey hunts this year and am looking forward to deer season. I definately want to have it with me no matter what the temps get down to.

Cold and snow don't seem to bother the hunting shoes you see on tv.

I think my owners manual says not to have it in below freezing temps for more than 20 minutes. As much as i should heed those warnings, i probably wont.