2017 was the year video went vertical

The iPhone X is basically one gigantic screen, but the "notch" right at the top of the display guides the owner on how to hold it. The phone should be held vertically, where the length is far longer than the width.
And yet, since the introduction of the iPhone a decade ago, online videos have forced people to turn their phone 90 degrees to view horizontally. The motion even inspired the name and marketing for Verizon's go90, a video streaming app that launched in October 2015. 
This year, h