How do you change the file format of videos to fit Youtube?

i have windows movie maker, and when i try to upload a video from it to Youtube, it says the file format is invalid. How do I fix this?How do you change the file format of videos to fit Youtube?
If you want to get high quality video ,u can save the video as avi video on windows movie maker, then convert the avi video to FLV with E.M. Youtube video download tool.

then upload it to youtube.



How to save video on windows movie maker? here is a good way for u.

http://www.microsoft.com/windowsxp/using



http://www.google.com/search?hl=en%26amp;q=%22



(1)It can search any flash video from many websites at the same time ;

(2)Download youtube video fastly and easily;

(3)Convert flv video to any audio include MP3, wma,wav,ac3,mmf,amr,ogg,aac..., to any video formats include 3gp,avi,wmv, mpg,mpg4,asf,swf,h264,mov,jpg, that can be support by PSP,iPod,iPhone,Apple TV video,iTune,MP3,MP4,Zune,Cellphone,Digit?camera,DV,CD/DVD/VCD/SVCD.

(4)Burn flv video to CD/VCD/SVCD/DVD disc easily and fastly;

(5)It still can repiar and capture RTMP video streams.

(6)Total video player that can play any video or audio.How do you change the file format of videos to fit Youtube?
Are you saving the files correctly? You should just click on File, then click Save Movie File, all movies are converted to WMV format which should be accepted by YouTube.