That is right. google and yahoo are your good source looking for the videos. I had read a post before that the top 10 search keywords in yahoo and google are sex related keywords. So you could find the videos by keywords easily. Another interesting is that yahoo(yahoo.com) is one of the top 10 search keywords in google. google(google.com) is high search volumn keywords in yahoo. Many people can not distinguish the search bar form and the address form.
Justinlorder well also people are to lazy to move the mouse to the address bar and type in yahoo.com (i do that yahoo.com search a lot of times cuz i am just to lazy lol)