To download this video file, you must to use the Camtasia Studio, CamStudio or other programs like Adobe Captivate to record your screen, Once it have been recorded, you must save your video file and edit video using this app like Adobe Premiere Pro (or Sony Vegas). To edit this video file before downloading, import AVI files in your library and add to the timeline, import an another the sound file and then add to the timeline. Once done, export to MP4 file using Adobe Premiere Pro (or Sony Vegas) after downloading.