If you ever wished to download a playlist from youtube even with some really useful firefox extension like Video Download Helper it is a pain in the ass. You have to manually visit each video in the playlist and then download it. Now i came across a freeware today that makes downloading youtube playlists (and videos of course) simple. All you need to do is give it the playlist URL and voila it starts downloading all the videos. The application is called YouTube Video Downloader .

Click the following screenshot to enlarge.

And best of all, this application is distributed thru torrents.   mininova.org

It is produced by people from quack-ware.com and is currently in version 1.7.2

The program is compatible with all the windows version including Windows 7. It needs .net framework though

Developer’s Comments

New in 1.7.2
- Changed various GUI Elements to make the downloading process smoother.
- Fixed non-working downloads. Users now have a choice of a maximum of 4 different file types.
- Rewrote almost all the download code, program is about half as small now.
Online version available here!
Direct Download Available Here
FEATURES:
- Download YouTube videos in either regular quality .flv format or high
quality .mp4 format. All you need is the YouTube link!
- Extract the .mp3 directly out of the .flv files from the videos you downloaded!
- Generate a download link for any video
- Automatic file naming based on the video name
- Drag and drop urls directly into the text boxes.
- Multiple downloads at once and notification of when your download is finished.
- Progress Bar to see your download progress.
-Download videos from www.metacafe.com!
Any problems, suggestions, questions, or comments please contact me at QuackWare@gmail.com
I wrote this myself and I will continue to make easy and useful programs like this for free distribution so look forward to more . If you would like to be notified of what I am doing or donate to keep good programs like this coming click "Get Extras" in the Help Menu in the program.
Note: If you are getting an application error while trying to run this or any of my programs you need to download .Net framework. The download is available for free here:
.Net Framework

Notes:

• Give it the playlist URL such that nothing is following the string of letters eg. http://www.youtube.com/view_play_list?p=586D322B5E2764CF 
• The program will hang after you click the download button. do not worry its normal. it’ll respond in a couple of minutes
• This program downloads videos one by one i.e no multithreading. but it is still a very useful program

Download Link – YouTube Video Downloader 1.7.2