I know the video. I usually don’t really resonate or fully agree with his conspiracy-ish opinions, but he does have a good point though apart from “they don’t want you to know” stance.
I think it’s not so much the chakras themselves that are bad like DarkestKnight said, but the method of activating that doesn’t compute with the system Universal Mastery offers energywise or just with the methods a black magician/ LHP practitioner generally uses.
There are alternative ways to activate or work with them them, like the Lucifer meditation C.kendall shared a while ago.