Aron Hicks hurriedly tried to overtake on the brow of the hill last May.
A 28-year-old man has been jailed for over 3 years, for causing a fatal crash near Didcot.
Aron Hicks admitted causing death by dangerous driving, after the head-on collision in 2021.
Pensioner Brian Hunt, who was driving a Honda Civic in the opposite direction, later died of his injuries in hospital.
Police say the actions of Aron Hicks from Camberley in Surrey, have torn a family apart.
You can see the shocking dash-cam footage here:
Senior Investigating Officer Sergeant Dom Mahon, said: “At the families’ wishes, we are releasing the footage of the fatal decision that Hicks made that day.
“Hicks was in a hurry that morning and decided to take a dangerous chance, which tragically cost Brian Hunt his life.
“Hick’s reckless actions have torn a family apart and will have lifelong consequences for everybody who has been touched by this avoidable tragedy.
“The shocking dash-cam recording of this incident demonstrates very clearly how impatience behind the wheel can be fatal.
“My thoughts remain with the family and friends of Mr Hunt, who have shown tremendous patience and resolve while we investigated this tragic incident.”
Hicks was driving his white Ford Transit van on the A417 between the junction of Half Penny Lane and Aston Tirrold.
He overtook one vehicle and then partially returned to the correct side of the road.
However, Hicks then attempted a second overtake as he approached the brow of the hill.
Unable to see what was coming in the opposite direction, he collided with Brian Hunt's vehicle.
Hicks - who suffered minor injuries as his van overturned - was sentenced to three years and four months’ imprisonment and disqualified from driving at Oxford Crown Court on Tuesday (14/6).