Just three years into their career and just months before the release of the their acclaimed album “Aqualung,” Jethro Tull performed on the final day of the 1970 Isle of Wight festival. Aware-winning director Murray Lerner captures tension between the hippie audience and show organizers, and audio commentary by from man Ian Anderson provides intimate perspective into the band’s festival experience. Songs include “Nothing is Easy” and “My God.”