This person has about 7 videos (story spoilers) I think they are playing on easiest, and beware,
they are an amateur that doesn't use effective dodging or attacking. They rarely use tag team, and they seem to only like using one type of weapon mostly. The story definitely gets even better later on, and better bosses too, very nice character interaction between the sisters too!!
Mission mode (mission 12) I think that's being played on easy, but this player seems to be a bit better than the other player.