[curiously]

Almost all popular videos on YouTube are just uploaded in lower quality on Facebook, and friends posting themselves in videos really have a limited audience and tolerance for ads.

Given Facebook's shady history of fake likes and other metrics fudging, it'd be a hard sale.

Who goes to facebook to watch funny or die? Anyone with even the minimal sense of humor and self respect won't waste time watching that lame show. Youtube might just be okay with l getting them go, because at the end of the day people go to youtube to watch videos, not facebook, unless you enjoy watching idiot of a friend's embarrassing moments drunk,

[JoshTriplett]

I suspect there are a substantial number of people whose primary interface to "what's new on the Internet" is to check Facebook. Sure, there are better tools, but it's hard to argue with the "everything in one place" approach.