I have the new base-level 2017 MacBook Pro 13" (non-****bar). Very often, the fan starts running jstu because I'm playing a simple 720p YouTube video. Even more so when I play it at 1080p so I stopped doing that. The MacBook itself does not get hot, and Activity Monitor does not show any high CPU peaks (CPU stays under ~20% when the is running). What is going on? And what can we do about it? Any help into the right direction is welcome. Edit: Oh and I'm using Google Chrome of course.