How do you upload a youtube video to computer?

yes....
this will help you.... Use 'zillatube'.
This is the easiest
(and also the fastest) way.
Zillatube produces mpg/mp3 video or sound formats from youtube that are compatible with windows movie maker(or windows media player), and more.

How to convert FLV to AVI, MP4, MPG, MPEG, ASF, WMV, MOV, 3GP, AMR and more?

Also for high quality conversion, use vcd mode to get good quality mpg file.
Just get those clips you want , save & convert them, and then mix/match with pix/sound/etc using windows movie maker(included in your windows machine) to create new masterpieces..
It is very easy to download and convert videos. Then edit those converted mpg videos with windows movie maker.

Video Converter for Mac convert videos among various formats for computer or portable devices use.

It works very well -
www.zillatube.com
It's easy.
U just need a video converter.

Lites Case - Webs for iPod nano $5.98.

It can convert MP4, H.264, AVI, MP3, WMV, WMA, FLV, MKV, MPEG-1, MPEG-2, 3GP, 3GPP, VOB, DivX, Mov, RM, RMVB, M4A, AAC, WAV, etc with high speed and excellent sound/image quality.
www.soft82.com/download/windows/p…
How to save video on windows movie maker? here is a good way for u.
www.microsoft.com/windowsxp/using…
if u want get "watch in high quality" for your video on youtube,
Click "other to youtube" to Convert the video wih E.M. Youtube video download tool.
then upload it to youtube
You can try Cucusoft YouTube Mate, Which helps you download, convert, play and manage your favorite YouTube videos... and it's very easy to use. If you're a YouTube fan, you'll love YouTube Mate!
YouTube Mate Key Functions:
(1) Download YouTube video
(2) Converts YouTube videos to various video formats
* Input format : YouTube FLV,SWF,AVI, DivX, XviD,RM, RMVB, MOV, MPEG, WMV .
* Output format : MP4,AVI, 3GP,WMV,DivX, XviD,RM, RMVB, MOV, MPEG MP3 etc.
* Portable device:iPod Classic, iPod Touch, iPod Nano, iPhone, Zune, PSP,Mobile Phone,Apple TV.
(3)YouTube VideoPlayer
It supports offline play YouTube video, .flv video and .swf video.