YouTube definitely deserves mention as second largest search engine as year 2011 saw more than 1 trillion views and now year 2012 is seeing huge activity by virtue of incorporation of channels which is doing well for the Youtube video views. As a net result video views have increased by 25% i.e. 4 billion YouTube videos are viewed a day as compared to previous 3 billion videos.
It is interesting to note that more than 60 hours of video is uploaded on YouTube every minute and a few months back this figure was 48 hours. More than 3 billion hours of video is watched each month on YouTube and this translates into an average spend of 26 mins on Youtube for every human being on earth.