Youtube has set such examples in the history of human race that none can compete them ever.
It will always be in the pages of history that youtube brought such a concept to everybody, whether poor or rich, literate or illiterate, India or Foreigner, that anyone could share and receive any video information at international level.
Say any field of education, technology, history, politics, entertainment everything is there. The service and support is there. Depth of information is there.
The usability is perfect and even web loading time is also negligible, I say there is no delay in it.