Download sparkol software from their website, create a story for your video. Use loquendo.com/en/demo-center/interactive-tts-demo/ for voice over, or you can see ivona website. You have to record the voice from voiceover and convert it to mp3 and than upload to sparkrol video. After create te video, you have to record it with camtasia. You can have 1 week for free the sparkol software.