Hence why it's important that everybody use it for innocuous reasons. Benefit is two-fold: it helps users with something to hide (eg. journalists, human rights activists) stick out less, and in the event you have something to hide, makes it less suspicious for you to use.
Tor doesn't provide enough value that users will use it. The average person will not partake unless it gives them value or it's free. Expecting anything else is a fantasy
I am not so sure about that. The top usage of tor is according to one study, by domain: Facebook, google, blackplanet, yandex, bittorent index, photobucket, craigslist.
YouTube works fine and has for years. Earlier this year Google started blocking some requests and due to the use of a redirect you often need to create a `New Identity` to get around it. It _usually_ helps if you visit the youtube.com homepage first, though.