Can't start recording?

Wanted to make a Fortnite video today, I did too, everything worked, sound was great, BUT: the screen was black:

Why is that?

what is this "program" anyway?

Try Bandicam

OK

This is the Xbox Game Bar. You can use it to take videos and pictures.

There's probably something wrong in the settings that it can't record the game correctly. You have to click your way through.

OK

You have to click on the plus symbol under "Sources" and then on "Game recording".
If you have Fortnite open you can choose it.
If that doesn't work, check out a tutorial on YouTube.