Okay, so imagine you are in school and you have to go to court because someone said you did something wrong. You have to talk to the judge and tell them what happened. But, you are scared to talk in front of people and you don't want to face the person who said you did something wrong.
That's where Maryland v. Craig comes in. It is a court case that decided whether it is okay for a child who is a witness in a trial to testify (talk in front of the judge and jury) through a closed circuit TV instead of being in the same room as the judge and jury.
The court decided that in certain cases, like when the child is scared or may be traumatized, it is okay for them to testify through a closed circuit TV. This way, they can still tell their side of the story without feeling scared or traumatized.
So, just like when you have to give a speech or presentation in school and you can do it through a video instead of in front of the class, a child who is a witness in a trial can testify through a closed circuit TV. It's a way to help the child feel more comfortable while still making sure that everyone gets to hear what they have to say.