Michael Green (his son, Kidbehindacamera) confirmed on Twitter that his father (Angry Grandpa) has died.
All I can say is that I am heartbroken, I know Angry Grandpa is a Christian (as I am) and is in Heaven but to have him struggle through skin cancer, his evil son Charlie Green III, and finally Cirrhosis which caused the ammonia build up which resulted in YouTube loosing a legend.
Farewell Charles Green Jr., you were the best grandpa anybody would love to have in the family RIP
As Horatio in Hamlet would say: "Now cracks a noble heart. – Good night, sweet prince, And flights of angels sing thee to thy rest!"