Resend Email A good feature would be the ability to resend verification emails In case it fails to send or whatever.

extra layout 2013 layout cos why not

YouTube in 2005 I use sometimes Yes, I think...

Annotations You guys could add annotations, it would be great!

Add photo comments, Downloading Vids and a separate layout for mobile Adding Photo Comments: It would be funny for memes
Downloading Vids: It would be nice if it was native to the site instead of having to do it through a third party.
Separate Layout For Mobile: Would be nice if you could change to a mobile UI aka made for phone users and still computer layouts on your phone and vice versa (albeit it would be one layout for phones) too if you want. It would be separate none would affect the other and it would be two different channel layouts you would swap between on their page (it would be automatically computer or mobile depending on what your viewing on also only one if they only made one) finally you would be able to make both on computer. Message me if you decided to implement on of them from my comment.