NTSC

NTSC is a way to make pictures and sounds go into your TV. It's like a special code that helps the TV understand what to show you.
When you watch TV, it moves really fast, so NTSC helps it to move even faster, so you can see it all clearly.
Also, NTSC is used in some countries to make sure that the pictures and sounds look and sound the same no matter where you are in the country.
So, basically, think of NTSC as a way to help make sure you can watch your favorite shows on TV and hear them clearly.