Luke is the main hero of the original trilogy, it was called original from the adventures of luke skywalker.
That was the title on the novelization.
I do understand the point of the video.
But The trilogy is Luke's story, Hamill is the main star, despite what people have come to believe about it being Han Solo's story and Ford's series.
Lucas decided to turn the saga on its head with the success of empire and jedi and made Vader the hero of the saga, stupid move.