Here is another free video converter, that will also download clips from various websites.
Giveaway of the Day - free licensed software daily. Today: VideoGet v3.0.2.39 - VideoGet is a tool for downloading your favorite video clips from more than 100+ video websites. It supports such websites ...
Its only available for 24 hours, free of charge. There is no help from the company with this item, and you do not get free updates, but hey, its a free video converter/downloader.
Enjoy!
EDIT: This will also convert existing videos. Its a little strange, but the dropdown box when you choose a video site, has an option for files. Unfortunately, its not GUI friendly, and you actually have to list the location and name of the file as a URL. i.e. file://C:\My Documents\ etc etc etc.
Hope This Helps!