As Youtube rolls out more additions to it’s mobile services, 40 percent of it’s views from the U.S. come from mobile devices, and 25 percent of views come from mobile worldwide. In addition, the ad revenue from mobile devices has effectively tripled over the course of the last six months. Much of this increased revenue comes from the release of YouTube’s app for iOS which was released late last year.

As more people turn to mobile apps as a means of watching their videos, advertising on YouTube should also become increasingly mobile. Advertising for mobile apps could probably have an increasingly relevant place on YouTube for advertising. If more people are using their mobile device to view videos, odds are that they would be using their smartphones for entertainment as well, leaving a lot of room for advertising mobile games and apps.