What is UltraDVD Player?
Please see "Product" page.

What are the system requirement?
To run UltraDVD, the system requirements are:
Minimum: Pentium II 350 PC or higher, 32MB RAM or more
Recommend: PentiumIII 450 PC or higher, 64MB RAM or more
The operating system should be Windows 95, 98, 98SE, Me, NT4, 2000 or XP. DirectX 6.0 or higher is required. (DirectX 8.0 or higher is recommended).

What kind of media formats UltraDVD can play?
DVD-Video object files (*.VOB)
MIDI Audio files (*.MID; *.RMI)
MPEG-1/2 files (*.MPG; *.MPEG)
MPEG-1 Audio Layer-2 files (*.MP2)
MPEG-1 Audio Layer-3 files (*.MP3)
MPEG-1 Video files (*.M1V)
MPEG-2 Video files (*.M2V)
Microsoft Waveform audio files (*.WAV)
Windows Media files (*.ASF; *.WM; *.WMA; *.WMV)
Video for Windows files (*.AVI)
Video CD files (*.DAT)

Why UltraDVD DVD/MPEG decoder is almost fastest in the world?
Please see here