How do I set up display banner fallback?

If your account has this option available, under your player monetization settings you should see a display banner ad slot option.

This option requires a JavaScript or iframe code snippet which would call your display banner so just paste it inside the input field.

Take note that this display banner will get called only if your pre-roll (linear ad) for any reason does not return an ad. Due to this, it works as a fallback in case your linear ad demand does not fill well enough.

There are no display banner size limitations.