I'd say it's probably not worth the added expense to upgrade to Sorenson. With such short clips, there are probably ways to minimize the file size in WMM. Have you downloaded the Windows Media Encoder? It's free, and may offer additional controls that WMM doesn't. Depending on the type of content, you may be able to get away with dropping the fps down to 15 fps. If the video content is does not have a lot of fast motion or quick scene changes, this will be a good reduction in file size. Unfortuantely video with fast motion and/or quick scene changes will look jerky at 15fps.