I was shocked to find that this wouldn't even work on my desktop! You have to go to the browser settings and turn off hardware acceleration. If you rent an HD movie from Prime Video, you get a notice saying that your screen has to be compliant with some specific standard, and part of the standard is essentially baked-in DRM that prevents taking screenshots of the content. The device belongs to me, the content was streamed to me, the device has no business preventing me from taking a screenshot or recording video. Yet here we are, apparently DRM is baked into all of our screens now.