Virtual Assitant On Macintosh ONLY

I need a VA that uses a Mac and preferably has a copy of Screenflow. Video experience preferred, but not necessary. All this really entales is taking videos I provide and swapping out one line of the voice over that I also provide. It's VERY easy, and I will provide ALL STEP BY STEP INSTRUCTIONS. If you're detail oriented and you can understand step by step instructions please apply for this job. No video experience needed as I will supply the instructions. This is a part time job for a couple hours a week.