Factual error: After the TV producer talks to Norm and Shake, three Beatles (minus Ringo) appear singing the theme song of the movie "A Hard Day's Night". Not only are their lips not moving, but they couldn't possibly have been playing "A Hard Day's Night" because it wasn't written until after the movie was completed.
Factual error: When they sing "I Should Have Known Better" look at Paul's left wrist - he's wearing a metal ID bracelet. Anyone who plays guitar knows that they jangle against the strings. He makes sure in any real live performances that it is tucked up in his sleeve away from the strings.