You're joking right? Is this not his most recent skills video?The one's I've seen are neutrally buoyant. PADI only requires a neutral buoyant skill set since last year or 2020.
That's painful to watch.
PADI and all the other WRSTC members should have required far more a long time ago.
So no, Marcel's videos are terrible and should not be used as a resource except by those who wish to perpetuate mediocrity.