Thanks to an intrepid fellow by the name of Silk Encoder, you can now watch The Day of Sigma in its highest quality yet.
Unlike previous rips (which tend to be oversaturated or washed out) Silk Encoder actually went into Maverick Hunter X's source files, ripped the video and audio, synced it, and encoded the whole package to 1280x720 in meGUI. It's a big step-up from the 480x272 source and it should hold us over until Capcom provides an official HD release. If they ever do.
If you like what you see you can head to YouTube and grab yourself the file directly from the video description.