Is it permissible to sell a video about death, enticing viewers with sexual content that arouses their curiosity, and claiming there is a girl undressing, only for them to discover it is merely images of graves and things that remind them of death, knowing that the girl reveals some of her charms and that she herself posted her pictures online?

It is understood from the question that the questioner will use a picture of a girl revealing some of her charms to delude buyers into thinking that the clip contains pornographic scenes. This action is forbidden, due to its assistance in spreading indecency, and the fact that he intends a praiseworthy goal by it does not absolve him of responsibility, for the end does not justify the means. Both the end and the means must be lawful. As for producing video clips that remind of the afterlife and selling them, there is no harm in it as long as it is free from Shariah prohibitions.