The new Fire TV has cheap 4K HDR video and a lot of problems.
Fire TV Stick 2 review - FlatpanelsHD
Fire TV Cube review: Alexa hasn't killed remotes just yet
A 101 on the Fire TV Stick
Best Buy: 50 Class 4-Series 4K UHD Smart Fire TV 4K50N400A/B0B3GTSQ9Q
Fire TV Review
Apple TV 4K review: Almost perfect
Does the Fire Stick really work with any non-smart TV? - Quora
Fire TV Stick 4K Review: I Use It to Stream Shows to My TV
Fire TV Review: 11 Reasons You Should Buy One - And 11 More Why You Shouldn't