Amazon Prime Video is becoming a serious Netflix competitor. ... you'll see a “lock” symbol for movies and TV shows with ratings in your restricted categories.

Amazon Prime Video has hundreds of 4K movies and TV shows in its library. ... Whatever device you're using, if a video is encoded in 4K, there will be a UHD symbol on the show's details page.

Amazon Prime Video . As you'd expect, ... Once you've got the restrictions set up, you'll still "see" the more mature content, but it will have a lock symbol indicating that it's blocked content.