Create 500 Training Videos for EMR product

We have a project to create 500 training videos (3 to 5 min each) for EMR (Electronic Medical Records) product. We are looking for real time experience person to create training videos with good voice. You need to have your own software to create the videos and we required original source files for the videos along with production file (video format should be industry standard). Please upload (or give us url link) to us your previous sample videos created (minimum 2) to help us in our selection process. We are expecting experience person to create one sample video on our product before final selection is made for this project. For each video creation, you will be shown functionality of our product relevant to the video content. You should have ability to create a written script to be subbmited to us which will be approved by us before you create the video for each funtionality. You will be paid based per minute of video time