In Brazil, the hours of content uploaded from YouTube channels has grown by 50% between 2017 and 2018. Related Data Mobile watch time of test drive videos on YouTube has grown by over 70% in the past two years. In the U.S., interest in videos related to stress management is rising, with watch time rising over 60% YOY. Black millennials' mobile watch time on YouTube has more than doubled in the last two years. Mobile watch time of YouTube videos with "ideas" in the title have grown over 135% in the past two years. 81% of video-viewing occasions get all or most of people’s attention. In the past two years, videos with the word "review" in the title had more than 50,000 years worth of watch time on mobile alone.