Apple TV 4K to Samsung 2017 smart tv 4k

This isn’t a question but a reply I have an Apple TV 4K and a Samsung smart tv 4K and it streams just fine in 4K. But there is one thing to understand when connecting devices in4k to a 4K television is you need to have a 4K hdmi cord that can handle the 4K streaming a regular hdmi cord will not work. Netflix amazon prime and all that are usually built in with an app. Now I know most of you already have figured it out already. I have a series 6 Samsung 4K tv with Apple TV 4K and works just fine but the hdmi cord is a 4K hdmi cord.