Here's a software that you can download called
DVDVideoSoft that you can use for many things.
You can:
-Download/Upload Youtube videos
-Convert videos
-Burn DVDs
-Edit videos/audio
-etc.
Downloading Youtube Videos
This I would have to say is the most useful part of this software. I'm not sure why it has the Youtube uploader feature since you can just upload it directly on youtube itself...
When you download Youtube videos, you can choose what kind of format you want it to be. You can download it as a normal .avi .mp4 .flv or you can download it directly to .mp3 .wav format or even burn it to an audio CD from there.
You can download it into a format for your iPod, iPhone, Blackberry, Apple TV, PSP and lots more. Basically anything you want. The latest version features a Facebook uploader as well.
Converting Videos/Mobiles
Here you can convert your videos already on your computer into many different formats. DVD, flash, .mp3, .jpg. You can also flip & rotate or even make a 3d video but it requires the use of 3d glasses. You can also convert it to audio format.
You can also convert your videos for your mobile devices such as Android, Apple TV, Blackberry, HTC, iPad, Nintendo & more. Even Xbox.
MP3 & Audio
Audio converters, Audio to flash although i'm not quite sure how that works... you can dub audio and there are also some icons which come from other categories like youtube videos and converting videos.
DVD Burner
This is quite self explanatory. Get your videos or audios off your CD or burn them onto a CD
Photos & Images
Convert your images and resize them or get a screenshot from a video. You can even make a 3d photo with the 3d photo maker although you'll need 3d glasses to see the end result. There's also a screen video recorder so you can record whatever you want to show on your screen instead of using a camera to record which isn't as good.
The best way to find out about it's features is to go to
DVDVideoSoft and download the software and have a play with it. The whole software's only 60mb.