Adding audio and video files to the Windows Media Player library will give you the option of opening the files using the media program. Depending on your computer, as well as the version of Windows Media Player on your computer, the program may not be the default player for audio and video files. In this case, you will need to manually scan through the folders on your computer in order to transfer audio and video files to Windows Media Player.
Open Windows Media Player.
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Click "File." Choose "Add to Library" and a window will appear in Windows Media Player.
Choose "Add" inside of the window. The "Add Folder" window will open.
Scroll through the folders listed in the "Add Folder" window, and click on the folder with the audio or video files you want to transfer to Windows Media Player.
Click "OK." The files will be added to the Windows Media Player library.
Repeat this process for all of the folders on your computer containing audio and video content you want to transfer to Windows Media Player.