Ask HN: Any experience with ClipGrab for downloading YouTube videos?

Did a search for "how+to+download+videos+from+youtube" on Google, and Google's own card comes up with instructions through ClipGrab and points here: http://clipgrab.org/faqs/howto-download-youtube-video.

I searched HN for any mention of ClipGrab and found nothing. Since it's software that needs to be downloaded and installed on my Mac, I wanted to see if anyone's used it, or if there are better/other alternatives.