Facebook and Youtube are phenomenal pieces of work. Shawn Byrd likes to use them for both surfing and information gathering purposes. If they are to be used to the benefit of the casual surfer, then using the search bar and clicking on similar links is all that is needed.
But, what if you have a business, and you need more exposure or additional resources? Both FB and YT can help you. Shawn William Byrd likes to embed videos from YT (this saves on your server space), and FB allows sharing to multiple audiences. You can also add buttons and metrics across websites to track and customize your client experience.
Helpful hints can be in video format, and Facebook is a ready-to-go forum for discussion.
Use it!