The MLB Fan Cave cannot be explained but I'll try. The MLB Fan Cave is basically like Survivor but it's always located New York and it's even more goofy than Survivor. One of the "challenges" the "cave dwellers" have is creating videos with the best ones helping the cave dweller advance. Here check out a few of them. Oh yeah, some of them involve actual MLB players. And they're weird.
I love baseball but man does MLB do some goofy stuff to promote the game. Whether it's the MLB Twitter account or this Fan Cave it all feels very high schoolish coming from baseball. At this point though I don't expect anything different from MLB and their fan cave videos are the best/worst.