Complex sentence: They released a five track E.P, "Pastor of Muppets", in September 2006 which has subsequently sold out, going on to record a video for their single "Pompino's Magical Blast", receiving considerable rotation on Alt TV.
Split into simpler sentences: They released a five track E.P. "Pastor of Muppets" in September 2006 which has subsequently sold out. They then went on to record a video for their single Pompino's Magical Blast which received reasonable coverage on Alt Tv.