If you have a ZIP file that contains a movie and you want to open the archive using Mega Zipper, you need to right click it and select Open With > More > Mega Zipper (from the provided list). To be noticed, that by doing this, you ill be able to explore the archive, but you won't be able to play the movie. To do this, while you explore the archive with Mega Zipper, select the movie from the right side of the window, and press the Extract button from the upper bar. Next, you need to select a location for your file and press Extract button. To play the video file, navigate using Windows Explorer to the chosen location and open the video with your default player application.