capture

UnPlug Firefox Extension

From the site:

UnPlug is an extension which lets you save video and audio which is embedded on a webpage - it's a video download tool.

UnPlug scans web pages and tells you where media players are getting their data from, and displays it as a simple hyperlink: in most cases, you can then follow the simple download link to save the media file.

UnPlug works for lots of sites including youtube.com, ifilm.com, current.tv, revver.com, peekvid.com, video.google.com, mobuzztv.com and lots, lots more.

Unlike many other extensions, UnPlug scans the page, and if it doesn't know there the data comes from it can guess - correctly most of the time.

Snapz Pro X

Snapz is shareware, it is not free. After the 30 day trial period the software costs $29. There are currently no free, open-source video capturing tools for the Mac. The good news is that Snapz is a slick and powerful tool. The captured video is of much higher quality than what's offered on the PC-side and the audio capture function works as intended.