I too just re-watched Help! about a week ago for the first time in a few of years. Kind of a funny & silly romp by a group of non-actor musicians who obviously capitalized on their immense musical talent. Like their movie A Hard Days Night, these films were perfect for their time.
What I liked most about the movies is, as you are watching the funny side of it, all of a sudden they break-out in song video parts.... and it sounds amazing.
Just like with Elvis' music.... every now and again I gotta plug in and listen to just the Beatles for a few days straight.
Ahhh... the memories....