Okay kiddo, have you heard of Ultra HD Forum? It's a group of people who work together to make videos look really super amazing.
You know how TVs have pictures on them? Well, Ultra HD Forum wants to make those pictures even better so they look clearer, brighter, and more colorful. It's kind of like upgrading your TV so it's like watching a movie at the cinema!
But to make this happen, they need to use a lot of special technology. They use something called "ultra-high-definition" or "4K" which means there are a lot more pixels in the picture than a regular TV. This makes everything look much more detailed and sharp.
They also use something called "high dynamic range" or "HDR" which makes the colors look brighter and more realistic. It's like seeing the world in a whole new way!
So, the Ultra HD Forum helps make all these things possible so we can have really amazing TV pictures. Pretty cool, huh?