Watch The War with Grandpa (2020) online

Who said grandparents spoil grandchildren? If anything, it is the grandchildren who "torture" their grandparents in the irreverent comedy with Robert De Niro and Christopher Walken entitled Grandfather This Time is War, based on Robert Kimmel Smith's children's novel.
Ever since grandfather Ed (De Niro) moved into his house, recklessly usurping his beloved bedroom and condemning him to move into the smelly attic, 12-year-old Peter has been planning a prank after another to force his elderly relative to pack his bags. . But the grandfather is not as fragile and scared as he seems and responds to fire with fire, or with a nice bucket of water to appease the boy's boiling spirits. The one engaged between the two is a battle with no holds barred of blows, jokes, teasing and punishments; a fight to the last trip for the conquest of the coveted bed.