Complex sentence: Appearing at the Woodstock Festival, Lee's performance was captured on film in the documentary of the festival and his playing helped catapult him into stardom, and soon the band was playing arenas and stadia around the globe.
Split into simpler sentences: Appearing at the Woodstock Festival, Lee's performance was captured on film in the documentary of the festival and his playing helped catapult him into stardom. Soon the band was playing arenas and stadia around the globe.