I want do automatic videoplay from usb flash. For example, I will create "playlist" file on usb flash and I will attach my flash to rpi. My python script will automatic read "playlist" file and if usb has "playlist" file, Rpi will make list this video and show to me. You can think like slideshow. Just should there is video show instead of image. I research python script for this but I could not find yet. How can i write this script ?