I don't even know what's going on in this video haha...tiny amount of health, hype rmode, weird body!? I have no clue what this all means sadly!
LOL. Hyper mode is a callback to Demon's souls where you start multiplying attack buffs and yet decrease your defense. You become a "glass cannon" i.e. you do incredible damage but are vulnerable as hell. Its a fun way to play for experienced players who enjoy the challenge of getting in quick before the enemy can get a shot in on you.
Things "going on" in the video:
Luck Build using anri's sword with 42 luck and in that video iirc 25 dex.
Morion blade in off hand gives 20% buff to attack power at lower than 20% health, hence the low HP in the video.
Same for REd tearstone ring
Fully hollow adds 5 points of luck for free
Flynn's ring adds what works out to ~10% more attack power at low equip load, hence no armour, (and you will be two shot with low health and denial on regardless so why worry about armour anyway.)
Dragon head stone gives 10% attack buff when charged (also gives a force effect which can repel knives in PVP) and raises some resistances while decreasing lightning resist
(dragons are weak to lightning in this game) - hence the dragon skin.
Denial miracle allows a second chance on life if you lose all your health which is particularly useful for low health hyper mode
Bleed gets more build up faster in enemies when you have a high luck stat so the carthus rouge is a good buff to use...you can see it helps destroy Aldrich quickly in the video.
wait...
after re-watching did pontiffs eye actually help me with the successive attack damage?!?!? It looks like I did a strike there that was much higher damage toward the end despite at least one earlier bleed providing less....always thought pontiffs was useless so took it off.