The dramatic recreations in this 1981 biographical film, showing Elvis Presley as portrayed by actors at various ages, are negligible. But when This Is Elvis isn’t wasting time on ersatz Elvii at ages 10, 18, and 42, it’s showing very entertaining, and sometimes rare, performance and screen footage. Elvis on The Ed Sullivan Show, sure, but also on Jimmy Dorsey’s Stage Show (pictured), and in his big-screen debut on Love Me Tender. When This Is Elvis shows the Elvis that is Elvi