Macbook Pro loading videos slowly

I bought my MBP in February of this year. Everything runs perfectly fine and there is nothing that seems to be wrong with the notebook. However when it comes to loading videos it takes forever to load them. For example youtube, it just takes too long to load the video and HD isnt even on, could this be a problem with youtube, macbook pro, or my internet?
I would appreciate any of your tips, thank you.