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I am using a screen recorder called DemoCreator[http://www.sameshow.com/download/demo-creator-down... I used some screen recorder before, but I did not get one which is free with the Zoom function. Maybe you can try the free trial version of camtasia or some thing like that.

A new software that I love: Screenpresso. I found it by chance. It's small, it's beatifull, it powerfull. That's really a great software.

problematic situation. research onto google. that may help!