react-native-video/docs/pages/_app.mdx

import {orbitron} from '../font';

export default function Nextra({Component, pageProps}) {
  return (
    <>
        <style jsx global>{`
        :root {
          --font-orbitron: ${orbitron.style.fontFamily};
        }
      `}</style>
      <Component {...pageProps} />
    </>
  );
}