Most probably the most visited site on the internet, weather it be music videos, movie trailors, video tutorials, study material, cooking related queries, recipies, tv shows, animes and whatevr you wish to watch its all at the same place and thats youtube. Google on one hand provides information about everything but as said video makes it more easier to understamd amd youtube provides you to find video on any topic and also for ones who have any talent or want to upload a video they can easily upload it on youtube and earn money if they suceed in getting large number of views and likes. Its the most popular site of todays time ans we all have visited it more then once for sure.