Web Forms :: Creating New Folder In Server And Video / Audio Uploading And Playing

I am a Bigner in asp.net c# learning. How can i create a new folder in server from my c# program. in my semester asp.net project, i want to upload video/audio files into my own newly created folder and the storing folder's name must be given by me, which means each time folder name may change during uploading time. and how can i give a picture link to that vodeo files containing in different folders and how can i play that files in the browser using a player.