Length of viewing time as a metric for popularity doesn't really work here. A 90 minute movie watched 1,000,000 times is 1.5 million hours of viewing time. A 2 hour movie watched 800,000 times will beat that with 1.6 million hours of viewing time and be more popular on this graph despite having 80% of the views.

"Popularity" is already kind of a nebulous thing to define anyway. If 10 people like movie A, but have no intent to ever watch it again and 8 people absolutely love Movie B and call it their favorite movie of all time, constantly re-watch it, and introduce it to others but the other 2 hate it... which movie is more popular?