I'll try some messy translations of what I can, someone can feel free to correct my inevitable mistakes.
オーバードライブは体力2、3割りで使うと今のブラカイの長さ I think he's just saying BK lasts longer depending on your health? (which we knew as OD lasts longer)
クラッシュトリガー生当てからBが繋がる Not sure again, might be you can do Crash Trigger from 5/2B?
6CHIT時の変な硬直が無くなってた、2B2回当ててる感じ No idea, something with how 6C feels strange
投げ>GH可能だけど GH追加がディレイ全然効かなかったYou can follow up throw with GH still, but delaying it won't work? (Unsure on the second part)
闇に喰われろ生当てで4400くらい、HIT数は100近かった BK raw DbD does around 4.4k, does about 100 hits.
新技はGHの半分の距離を進んで上から鎌を振り下ろす感じ、発生もGHくらい
低空で出すと発生早くなった I think he's comparing the distance the new move covers compared to GH? Ragna leaves the ground quickly when used.
DSはガンフレイムの感覚、面白い
コンボにも普通に使えるし問題無いんでは?ラグナ側の硬直は普通だと思う Something to do with the new DS, unsure of it's combo potential?
6A>JCJD>JCJDは浮きが低く繋がらなかった 6A>JCJD>JCJD doesn't work due to low float?
Take those with a grain of salt I guess, my moonrunes is still awful.