The popularity of Blu-ray has been a boon to JPop fans in general, and we DCT fans in particular. They've gone back and re-released a number of their Wonderland concerts in Blu-ray. Many of their DVDs (and some of their Blu-rays) are region ALL, meaning that they can be played on any DVD player in the world! Some of their DVDs also include an enjoyable karaoke option.
Most fans can only get a glimpse of DCT in concert through their videos and the group has made sure that their best performances are available on high quality tapes. Fans can also enjoy DCT music videos as well through the recent releases. All videotapes are NTSC, so they're quite playable on US VCRs.