It’s possible to take a screenshot on the Apple TV (4th-generation) or even record a video, but it requires a Mac and a cable to plug into the USB-C port on the Apple TV. Here’s how…
To Take a Screenshot of the Apple TV:
- Install Xcode (free) from the Mac App Store.
- Connect a Mac to USB-C port on the back of the Apple TV. (The Apple TV must also be connected to a TV or display via HDMI.)
- On the Mac, launch Xcode.
- Choose Window > Devices.
- In the Devices list, select the Apple TV.
Click the Take Screenshot button. (The screenshot will be saved to the Desktop.)
To Record a Video of the Apple TV:
- Connect a Mac to USB-C port on the back of the Apple TV. (The Apple TV must also be connected to a TV or display via HDMI.)
- On the Mac, launch QuickTime Player.
- Choose File > New Movie Recording.
Next to the red dot record button, click the Down Arrow and choose the following:
- Under Camera, choose Apple TV to capture video.
- Under Microphone, choose Apple TV to capture audio.
- Under Quality, choose Maximum or High. (The only difference I could find is Maximum captures audio as Linear PCM, whereas High captures as AAC.)
- When ready, click the red dot record button to start recording. (DRM-protected content will be blacked out, so you won’t be able to capture it.)