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Actually yes it would help.  Watching Laurence Olivier or Ian McKellen perform a role makes it much easier to follow and grasp the words.  A trained actor will bring to life the play.  The language is old, but not THAT old.
They should show the Baz Luhrman and also Al Pacino and other updated adaptations of Shakespeare, and then studying the source material seems more interesting by comparison to the modernized versions >

Lion king and hamlet would be fun too. >

Would showing trained actors help at all in understanding the language? At that point it’s just reading body language or tone, grasping at some words you do know. Basically like watching another countries theater. How much are you really understanding?