Youtube is an american video sharing website 
Can people make money posting videos on YouTube?
Yes you can but no specific numbers, but google did buy the site in 2006 for 1.65 billion
What types of videos can you find on YouTube?
It offers a wide variety such as video clips, tv show clips, music videos, short and doc films
Do they have a TV streaming service now? I think I heard something about that recently.
Yes they do now, another fact is that cbs and bbc and hulu offer some of their material via youtube now as part of the the youtube partnership
That's good to know! I didn't realize that. Is the content posted monitored somehow so there isn't bad stuff on there for kids to find?
Videos that are deemed potentially inappropriate are available only to registered users 
I don't know how we survived without YouTube when I was younger. Can anyone post something on there?