Rated 5 out of 5 stars
I tried almost all of the audio/video download extensions that are available, and this one (to me) is by far the best. It's not the most feature-crammed, but it's the easiest to use, and the most reliable. Click the status bar, then download.
Unlike the extension I had been suffering with for months and months (Why? Don't ask.), it doesn't present a slew of entries for each video, with most or those entries being invalid, time-gobbling nonsense, causing me to download partial videos that don't play at all. It doesn't aggravate me with stupid menus that flicker and don't work as expected. It doesn't inexplicably miss certain files.
It just works. Imagine that.
The only problem I have with NetVideoHunter is the delay that occurs when the status bar icon is clicked. (On my system, it takes several seconds for the NetVideoHunter window to appear.) But the author has told me he's working on a fix for that issue.