That video was posted here on FR somewhere. The day after I saw it, I saw a Fox News headline that said "No Force Used Yet in Gun Confiscations". Uhm... the video SAID Fox News, IIRC? Anyone else remember it?
Here's one link to the video...
Scroll down the page for the section titled;
CHP Takes Part In Door-To-Door Searches
http://www.ktvu.com/news/4936363/detail.html#
I've seen others versions of the clip though, and I too thought I remembered it being on FOX. I'll see if I can't find some of the other links. In this one you can hear her swearing at them after they tackled her. They say she had a knife as well as the gun, but I didn't see a knife. Also she wasn't holding her gun in a threatening manner. She did state - "you'll have to shoot me".