Good for studying and concentrating in general (about an hour long):
The Night at the Museum movies -- I just really enjoy them, my favorite is definitely the third, then the first, it's sorta the classic.
Mr. Robot (tv series) -- Airs June 24th. I don't know what it's rated but I'm really hoping I can watch it because it looks like it could be very cool + interesting. (teaser, review)
I saw the teaser for Mr Robot and it got me interested in computers so I started looking up about them, how they actually work, and now I'm hooked on understanding them. They're so cool. Here are two videos I found and like a lot explaining some basic functions.
And then there's one of the tv promos from the third Night at the Museum movie, they're so funny:
Lend me your hand and we'll conquer them all
But lend me your heart and I'll just let you fall
Lend me your eyes I can change what you see
But your soul you must keep, totally free
~ Awake My Soul, by Mumford & Sons
Websites + Articles:
CS101 -- Free online course with worksheets and all.
Great detailed explanation that starts at base level: How do computers work?
Because being able to type fast is cool: Learn typing at the speed of thought
And then these 'tests'/quizzes because they're fun (if you do any of 'em, what are your results?):
Kuku Kube (color perception test - slightly addictive)
What have you been into lately?