For me YouTube is really best site and great stuff
Service and support - The service has large amount of content for all the age group and interest
About information depth YouTube provides a endless source of useful information.
Content timeliness - you can find out how to do anything and everything on this site.
Design/usability - YouTube is well designed , it is easy to use, people can also use it to earn money by creating a channel.
Website load time- YouTube is very fast, people can find different variety of great videos here.