I think Demons are real and possession is real. The concept of spirit possession exists in many cultures and religions, including Buddhism, Christianity, Haitian Vodou, Dominican 21 Divisions, Hinduism, Islam, Wicca, and Southeast Asian, African, and Native American traditions. Depending on the cultural context in which it is found, possession may be thought of as voluntary or involuntary and may be considered to have detrimental effects on the host. Now in this video I'm not sure what's behind