What is the ruling on watching cultural films for sexual gratification instead of having intercourse with one's wife during a dispute, and is this action permissible in Islamic law?

Cultural programs are of three types: beneficial and permissible (desirable), harmful and forbidden (prohibited), and permissible with neither benefit nor harm (neutral). You can determine the type of programs you watch through this explanation.

One should be wary of Satan's cunning in causing discord between spouses, as he strives diligently to sow contention and separation. Both husband and wife should treat each other well and fulfill each other's rights. The Messenger of Allah, peace and blessings be upon him, said: "Indeed, Iblis places his throne upon water, then he sends forth his detachments. The one closest to him in rank is the greatest in causing fitna... Then one of them comes and says, 'I did not leave him until I separated him from his wife!' He [Iblis] says: 'He draws him near and says: 'Yes, you are the one.'"