The parent comment author is not the original video author, given his appreciative comments for the video. (Not sure otherwise what you meant by 'Well, since yo

The parent comment author is not the original video author, given his appreciative comments for the video. (Not sure otherwise what you meant by 'Well, since you're "here"') As to your question, that's exactly what the video covers. With a nice animation and everything. And really, I expect Facebook to post some useful numbers rather than forcing us to do the research.