You watch YouTube — everyone does. Whether it be some new product or a funny montage, we all use YouTube on a fairly regular basis. It’s the hosting site many turn to when they launch a product, find something cool, or want to share something potentially viral. The onslaught of Twitter, Facebook, and others like Twitter-owned Vine are having an effect on YouTube. According to The Wall Street Journal, YouTube raked in about $4 billion last year, but there was no profit. The answer might be a new ad system.