I bought Portal 2 last summer, and just got around to downloading it last night. I logged into Steam and played 5 minutes before turning it off. About half an hour later, I went on Youtube to find a video for my son and the most predominant suggestion, center stage if you will, is a Pewdiepie Portal 2 video. To call that a coincidence seems to be a bit of a stretch. Any ideas? Is there some way Youtube is interpreting my online actions and habits?