Is Skrillex more Dubstep or Brostep?

I have been listening to Skrillex with friends and there is always a division between them. Some think that Skrillex is completely Dubstep, while others say it is Brostep. I honestly don't know what Brostep is. What do you think about Skrillex? And what is Brostep?(http://www.youtube.com/watch?v=2cXDgFwE13g)