Sadly I couldn't get this to work. It was billed as resource for being able to take a recorded script and turn it into a video.
I followed the instructions, uploaded the MP3 and tried 3 times at different times of the work day. Each time, after spooling through 10% done / 30% / 60% / 90%, etc, I then got a message: "AI Failed - Currently AI server is busy. Please try again later."
Disappointing.