What percentage of video views on YouTube come from mobile devices?

A) More than 50%
B) More than 75%
C) Almost 15%
D) Almost 25%

The correct answer is:

A) More than 50%

Explanation: Between the end of 2013 and the end of 2014, the amount of time that people spent watching video on the Internet grew 38.5%. Every month, more than 1 billion people watch more than 6 billion hours of YouTube video. In addition, more than half of YouTube video views come from mobile devices.
This represents a lot of potential customers, both at home and on the go. And you can decide where and when a video ad shows, and which potential customers see it.
Read more here: https://support.google.com/partners/answer/6052202