What is the difference between CDGs, VCDs, and DVDs?
CDGs have no video running in the background when the song is playing. This means you will only see the words on the screen and nothing else. VCDs have a video running in the background, in addition to lyrics, while the music is playing. DVDs also have a video running in the background, in addition to lyrics, while the music is playing. DVDs will typically have more songs than either CDGs or VCDs.