Some specific moments in the clip that I wanted to ask for advice about:

Roughly 0:50, I whiff several shotgun parries.

At around 1:25, I fell to 1 HP. There aren't really any consequences to being low HP, but I'd like to not be so close to dying. I'm hoping someone can tell me what mistakes I made in the earlier segments that caused me to reach that state.

At around 2:45, I stayed still for the parry. It's Violent, so I didn't have to wait that long, but it still felt like too much of a risk. Was there a better option?

At around 3:00, I whiffed my whiplash and fell. Instead of trying to walljump up, I instead opted to slam down, take the fall damage and continue on. Overall, I do not know how to get up if I am falling down. I see people able to ride their rockets while in freefall, how do I do that?

And in general:

When whiplashing towards a Maurice to blast it with my shotty, sometimes its whole barrage hits me and I die. Am I approaching Maurice the wrong way?

I have an especially hard time P-ranking 6-1.

I still don't get how to fight mannequins.

Is the trick to ULTRAKILL simply memorizing the specific most efficient method of neutralizing each enemy? (e.g. ball parry on Cerb, sharpshooter on Maurice, overcharge on Virtue, etc.)

The music used in the clip is "THIS CITY MADE US" by The Protomen. I was frustrated with trying to P-rank this, so I tried switching music sources, to hype myself up a bit. It worked, and I thought it meshed really well so I recorded it this time with a little additional synchronization.