Help!

I need help putting a picture in my profile background http://i.ytimg.com/vi/30uPll_IPJQ/hqdefault.jpg thats the pic i wanna put, but then i put choose oic and some bs pops up
Ik it isnt a big deal
But please help me i made my acc last year and im still dumb :O

Is my internet slow or.. It takes 24 minutes one reply?