I know a kid who is a big fan of any kind of sports. He is constantly watching youtube videos that are basically stats and clips packaged up with some slight humor but very little analysis. This kid has basically an encyclopedic knowledge of sports... stats. All from youtube. I was also like this to a degree as a kid, but I got my info from stats books/magazines/newspaper sports sections. So in a way the outcomes are the similar -- young kids love looking at the numbers -- but I can't help but feel icky about the way youtube can just lock a kid in for hours and hours.
* Example video about Tim Lincecum that basically enumerates the stats of his career but doesn't discuss anything else -- his personality, his pitches, his unconventional delivery, etc. Just clips (that repeat) and stats. It's bizarre. https://www.youtube.com/watch?v=CgaPKJIF_Zo