I haven't found it, but then I'm sure there's an app that can do it! Everything that's a feature of a phone is basically just an app anyway, one that's provided by the manufacturer. It's rarely built into the kernel, that takes way too much work, and alters the basic design of the OS and it's UI...
Using 5.1, press and hold the power button until a menu pops up. One of the options it taking a photo of the screen another is making a video of the screen.
Using 5.1, press and hold the power button until a menu pops up. One of the options it taking a photo of the screen another is making a video of the screen.