Have you ever watched a movie or a show on TV and noticed that some parts of the screen look really skinny or really fat? That's called stretch-o-vision, and it happens when the show or movie was made in a different shape than your TV screen.
Imagine you have a big square box, and you want to draw a picture on it. But instead of drawing a square, you draw a skinny rectangle. When you put that box on a table, it might look a little bit weird because the rectangle will look stretched out.
That's the same thing that happens with stretch-o-vision. Sometimes shows or movies are made in a rectangle shape, but your TV screen is a square shape. So, when the video plays, the TV tries to make it fit the square shape but it has to stretch it or compress it, making some parts look skinny or fat.
Some people don't like stretch-o-vision because it can make things look weird or distracting. But, other people don't mind it because they like seeing a bigger picture or more of what's going on in the show or movie.
That's a basic explanation of what stretch-o-vision is. It's all about different shapes and trying to make things fit together on your TV screen.