How to delete movies/tv shows from my iphone5?

Somehow a bunch of tv shows and movies and documents from my computer appeared on my iphone recently (I'm guessing this has something to do with the icloud) and I don't want them. I can't even take pictures anymore because they are taking up all of my space. I bought them years ago and I don't know how they got to my phone. I tried "swiping" to the left, no delete button appears. There's no edit button. And when i plug in my phone to itunes and go to "on this iphone" and then click on movies, there's nothing there. It's like itunes does not recognize that these things are on my phone, but they definitely are.

Delete them from your library on your computer and then sync it with your computer, it will say something's are on your PC that arent on your iPhone would you like to sync them too? Click no.