The video shows Tracer and Genji “trying” to stop Doomfist. Tracer and Genji may be the worst against him.
When a Doomfist is on the field immediate switching needs to happen to counter to discourage the player to switch off Doomfist.
Tanks: Orisa is a must pick counter for me next to Zarya.
DPS : Bastion is my go to hero good versus Doomfist usually. Sombra can pick on him by saving her hack just for him. Reaper is ok if you know how to time his wraith to avoid getting punched.
Healer: Ana may be the top choice, but I like using Baptiste. IM field is great against Doomfist and to save teammates from his ult. I like using Zen if the other player is playing a main healer. Discord gives Doomfist problems.