Nemesis Form
Cooldown: 8 seconds
Transform into Nemesis Form, changing your attacks and gaining bonus armor.
Ravenous Vortex
Cooldown: 11 seconds
Fire a sphere of energy that creates a slowing vortex on the ground, damaging enemies within and pulling them downward.
Annihilation (Ultimate)
Needs to be charged
Enter Nemesis Form and create a deadly swarm that lashes out at nearby enemies, persisting longer when damaging enemies.
In case the video won't load here's the external link.
A Guide for the Hero Ramattra from Overwatch
The narrator talks about the hero generally then summarizies it's abilities and how you can use the effectively in the most precise but shortest way. In the background there are clips from the game, possibly it's the narrator's gameplay. He talks about against which heroes can and can't be this specific hero be used.