Knightmares

The story 'Knightmares' evolves around the young boy, Luke, who grows up with an autistic brother named Tommy. Luke feels rejected by his family as they are spending more time with Tommy, which makes Luke flee into a different world. This world is a combination of his imagination and his favorite computer games. Disguised as a fearless Ninja, Luke has to fight demons, which represent his biggest fears in real life to overcome them in reality.

Unfortunately the movie Knightmares is not yet available on HBO Max.