PewDiePie
And this year, just like every year, video games were one of the biggest components of YouTube's tremendous popularity. Heck, the most popular YouTube channel continues to be the most prominent video game streamer: Felix "PewDiePie" Kjellberg.
Given gaming's vast popularity on the service, YouTube's released a list of the top 10 gaming videos of 2015. We've embedded them all below for your perusal!