Complex sentence: When MTV moved to its current location at 1515 Broadway, they lost the studio where "Club MTV" and "The Grind" were originally taped and episodes were taped on the roof of the building.
Split into simpler sentences: When MTV moved to it's current location at 1515 Broadway, they lost the studio where Club MTV and The Grind were originally taped. Instead episodes were taped on the roof of the building.