For those of you new to the concept, you’ll need to know a couple of things. Many of these sites and tools simply grab YouTube videos in their native Flash format (FLV). To watch these files on your desktop, you’ll either need to get yourself an FLV player or convert the files into another format you can watch in your media player of choice (or on your iPod/iPhone, cell phone, or wherever the videos will ultimately end up).

Some of the listed tools include FLV players or file format converters along with the video download functions. Choose your poison according to your needs and patience level — if you do a lot of downloading it might be worth your while to check out the more full-featured apps.

Here is a simplest way to download videos from YouTube...