DESCRIPTION:
"LaRCS" stands for "Live and Record Combined Stereo", which means that on the left you can hear a live performance, while on the right the video clip. This format is great to discover interesting differencies!
Regarding the current video, on the right you can find the video clip of the song "Voyage Voyage", performed by the Gregorian (The Gregorian Monks), featuring Amelia Brightman (sister of Sarah Brightman), aka Violet, while on the left a live version performed in Prague ("Desireless").
Links:
http://www.youtube.com/watch?v=hGAJ-Uuc6yM
http://www.youtube.com/watch?v=GOwfxDFdh_4