Hasta donde pude ver funciona muy bien, incluso el audio generado en castellano... bastante poderosa, habrá que ver hasta cuándo es gratis su uso...
"Edit video as easily as editing text!
Do you need to create videos from images, audio files, video clips or screen grabs? Save yourself a lot of headaches by giving all of the painful parts to Video Puppet.
Video Puppet will automatically create video clips from images, align audio and video segments, add captions, and even create a life-like narration audio from your text.
To top it off, you'll be able to update the video easily when your content changes."