Just to address the issues mentioned in the two reviews.
1) the amount of video memory is important, not system memory. If you are getting a garbled video image on the screen, try reducing your screen resolution - this allows you to use more of your video memory for the video frames.
2) yes, the program doesn't notify the system so that the finder can update its view. This will be updated in the next verion. In the meantime, opening another folder and then reopening the folder containing the created movie should reveal the movie file.