Complex sentence: In June 2001, Wyatt was curator of the Meltdown festival, and sang "Comfortably Numb" during David Gilmour's performance at the festival, recorded on Gilmour's DVD "David Gilmour in Concert".
Split into simpler sentences: In June 2001, Wyatt was curator of the Meltdown festival, and sang "Comfortably Numb" with David Gilmour at the festival. It was recorded on Gilmour's DVD "David Gilmour in Concert".