I figured out simple ways to tell if you're actually watching in Dolby Vision

There's nothing more frustrating than putting your hard-earned dollars to work acquiring the best premium products or services you can afford and finding that you might not be getting what you paid for. TVs aren't cheap. The 4K TVs might be more affordable than they were 10 years ago, but they're still a high-dollar product. And paying top dollar for high-tier subscription services only adds to the total cost of your movie and TV entertainment. But just because you bought an expensive OLED TV and subscribe to multiple streaming services doesn't automatically mean you're getting the best picture quality. It almost sounds criminal, doesn't it?

Source : https://www.pocket-lint.com/i-figured-out-simple-ways-to-tell-if-youre-actually-watching-in-dolby-vision/