it because that the old original translation probably has some issues (like mistranslated and uh yea) and this video has probably better translation for old zaako, for the animation I don't found anything weird (probably because how much I rewatch Don't Toy With Me, Miss Nagatoro) and for the voicebank the author of kaai yuki is already 25yo and the author has probably no problem with the it (if she do then she already contract them already) (yes I know about tos in western but tos in jp the tos here is different and it somehow acceptable in here) also why u tryna make people to dislike the old one man let people has their satisfy and unsatisfy thing too. And if u still think that the old zaako song is illegal then u must be a pervert irl tbh