Camtasia automatic captioning?

The issue of creating captions is something that comes up very frequently and we would like to have all videos captioned but it will take a huge amount of time. Now Camtasia offers the possibility of automatic captioning bu using the Speech-to-text feature, which automatically creates captions from voice narration or audio on the timeline. It has to be trained, and can only be used in the PC, but i think it is a good solution, if the instructor uses his / her own PC to create the mini lectures with Camtasia.
Here a tutorial on how to do it: