Cute Male Eastern Gray Squirrel assisting me in evaluating 4K video on new Motorola Droid Turbo 2 Smartphone. He works for peanuts! Uploaded directly from Droid Turbo 2 using YouTube App including adding music. 1 minute file size 350 MB. Sound is pretty good, you can hear the squirrel crunching his peanuts at close range and hear the backhoe very loud digging up the neighbors backyard. Droid Turbo2 4K video player has very basic editing features, but trim process was very quick and easy. A test example of a seascape using 4K can be found at: https://youtu.be/5aYMHDwhJLc
Should be viewed at full 4K resolution on a 4K device to be fully appreciated.