Gladiator is streaming on Paramount+, Kanopy and YouTube TV. It's also free to watch on Kanopy and Hoopla. You can also rent or buy it digitally.
After the death of Emperor Marcus Aurelius, his devious son takes power and demotes Maximus, one of Rome's most capable generals who Marcus preferred. Eventually, Maximus is forced to become a gladiator and battle to the death against other men for the amusement of paying audiences.