Sv: Movie maker?
Du har för det första lagt inlägget på fel forum.
För det andra borde det väl finnas hjälp att hitta angående format och det på youtubes hemsida?
Hittade vid en snabb sökning till exempel detta i deras "general help center".
Failed (invalid file format)
This status message means that the file type of your video isn't supported by our site. YouTube does not currently accept videos in Flash (.flv) format. You may need to try using software other than the software that came with your camera, such as Windows Movie Maker (included with every Windows installation), or Apple iMovie. By opening your video file with one of these programs and then saving as .avi, .mpg, .wmv, or .mov, you should be able to upload your video with no problems.