When the DVD Player is launched it searches all local drives in alphabetical order from C:, looking for a Video_TS folder. When this folder is located, the data file within it is loaded, and video streaming begins. If this folder exists on a drive that comes before the DVD drive, the player will try to play the data in the first folder it finds.
In Windows 98 and Windows 2000, DVD Player only plays DVDs if a hardware-based MPEG decoder is present. In Windows Me, DVD Player supports software-based MPEG decoders.
With Windows XP, Vista, Windows 7, and Windows 8: DVDPlay.exe was dropped as a separate application in favor of DVD functionality introduced into Windows Media Player. While the DVDPlay executable still resides in %Windir%system32, it simply executes Windows Media Player. However, the full-working hardware-based version was still included with Windows XP pre-RC1.