Make sure you have a frost or bleed infused weapon at hand to be able to deal damage through shields. Another option might be to swap to Hammer Talisman - need to test this more though.
Always try to determine the latency against every opponent. I like to throw Fan Daggers at the opponent and see how long it takes to register the hit.
Ultra Greatswords like the Zweihander are good against high-poise opponents like the one in the video.
When being pressured by an opponent make sure to unlock while rolling for safety. Keep the camera on the opponent to make sure you’re not getting roll-caught.
Make sure to have Flame, Cleanse Me available even on low level builds.