>.mpg and .mpeg file formats are supported by media player in windows 8.1.
The page you linked to says mp2 files are supported -- they aren't. Media Player only plays the audio.
Actually, according to GSpot the codecs are there but there is something that prevents them from being used as input to Microsoft DVT-DVD Video Decoder.
>DVD codecs are not included with windows 8.1. They were included with most versions of 7.
IOW, Microsoft is now charging for what was part of the base system in prior versions of Windows.
So far I have paid $1799.00 for the Surface Pro 2, $129.99 for a Type Cover 2, $199.99 for a dockiing station, and $149.00 for Microsoft Complete plus sales taxes. Then I had to buy a USB to Ethernet GIGA Bit connector (because the docking station's technology is so old it only supports 10/100 Ethernet) and an mini display port to VGA cable. Even with the USB to Ethernet GIGA Bit connector the SSD is so slow data transfer is limited to around 335 Mbps -- about one third of the network speed.
Now Microsoft is asking me to pay to be able to view videos that worked in every version of Media Player from 7 to 12. What's next -- a subscription fee for Windows Update so Microsoft can profit from its bugs?