So is this some sort of hyperventilation breathwork done in savasana to pop music? I guess as long as the breath retentions aren't super long they should be ok, as long as the practitioner doesn't have underlying health issues, but I've seen videos of people having mini seizures doing Wim Hof breathing. Just be careful with it, there's a reason why pranayama is introduced gently and progressively over a long period of time.
Also, I would maybe drop the references to meditation. It seems more like breathwork in the tradition of a Stanislav Grof, which is totally fine and valid, just maybe misleading for newcomers expecting meditation.