0taku is right on spot.

Having servers, domain and even proper script isn't enough. You need to have/find a way to attract ton of users and not flood the website with ads. Advertising/Marketing part is crucial here, there are already ton of Porn tube websites.

Once you get on the radar and have decent amount of stable visitors you can start putting ad banners, popups and such.

Worst thing you can do is start fresh, without any visitors and spam the shit out of the website with ads, rookie mistake.