XSVCD is yet another hack of the VCD format, this time pushing the bit rate of the SVCD to the same level as DVD (9.8Mbit/second). XSVCD can also output PAL or NTSC resolution.*
The main advantage of XSVCD over XVCD is that most DVD players can read SVCD, so they can by default read the XSVCD format too.
Unfortunately, as it is with the XVCD format, very little material can be held on one disc, making it virtually impossible for the format to ever accommodate anything but short clips, or music videos.