In that case, try to choose warmer movies, but I only recommend two or three foreign movies here, because I think old people will get tired of watching subtitles.

Dog's Purpose, Forgotten Time, Hachi: The Dog's Story, The House of the Rich, and Ghost Dog Shirley.

If the elderly like war movies, I recommend-

Red Guards in Honghu Lake, Wolf Warriors, Private Zhang Ga, Outwit Tiger Mountain, Tunnel Warfare and operation mekong.

Because I don't know what kind of movies your old man likes, I recommended them according to grandpa's preference ~