I think I'd go with YouTube,
YouTube is currently the second largest search engine which is just next to Google. But it is the largest search engine for videos.
People search YouTube frequently in search of videos like music, football, debates, movies, pranks, comedies, skills acquisition, tutorial, make upping, relationship tips, etc the list is just endless. Thus YouTube has become a must use for everyone. In the normal day to day business, the more customers you have or the more people buy from you , the more money you make. It is also like that on the internet. Truth is that not everyone is a converting customer, but of 100 viewers, at least 10% will be converting customers. Therefore, a wise business man will do everything possible to increase the number of his customers. So also, the more traffic you have on your video or channel, the more money you stand to make.