One of the issue I have with Mac QuickTime recording when I do screen recording of videos playing on Mac with it is it records both the MacBook video sounds as well as external noises through the Mac speaker.
Does your tool allow recording on only the sound of the video playing and not the external noises like people speaking around me when I am screen recording?
Secondly do you have an iPad version of your software which I can screen record on an iPad? These two will determine if I can buy it.