For recordables, DVD-R media is recommended, as they are the most similar to pressed DVDs in terms of reflectivity. Pressed DVD-ROM video discs of course work. If you wish to have both a drivechip and DVDX, you need to be on 3.3 or earlier, and you need to install v1 using the Patchmii method. In fact, drivechips are often not compatible with DVDX. It should only be used if an older homebrew application requires it for compatibility. It has since been replaced by the Homebrew Channel, which offers the same features and more.
DVDX is an obsolete homebrew application that was used to access DVD content on a Wii console without the need for a modchip.
