"To edit YouTube videos in Windows Movie Maker you need to do a couple of things. First you need to download the video from YouTube. Next you need to convert the video from the FLV file from YouTube to a video format supported by Windows Movie Maker (like WMV). Keep in mind that the YouTube video will be 320x240, which is not a television display resolution, so if you're planning to burn a DVD the video will look even worse than it does on your computer because it will contain all of the compression artifacts introduced when it was uploaded to YouTube. The first part of the process is downloading videos from YouTube. I've detailed several ways to do this via Web services and applications in previous articles. If you'd prefer to simply copy and paste the URL of a YouTube video page into an online form, KeepVid remains my favorite solution."That's an wonderfully described set of steps that makes editing videos off of YouTube easy. Hmm, I wonder if this will lead to an increase in mixed videos.