of universal statements (except this kind!). Neither all DIR divers nor all non-DIR divers are good or bad.
I'm not convinced this video says anything about DIR or non-DIR divers. The video shows individuals. The ones on the line appear over-weighted--finning at the end of a dive when they should be light. If they are instructors or are 'advanced', they need help and they need to dive with someone who can help them.
If the hovering divers are really DIR newbies, as their taunting suggests, they are no help to anyone and I'd worry about where their smugness might lead.
From my humble experience, when I REALLy learned bouyancy from my diving Zenmaster Heidi, I pushed to see how little weight I could get away with until my smugness made be too light on a deep dive, and the finning to stay down gave me close to an OOA and that could have required a deep free ascent. I hope these youngsters learn humility without getting hurt. It would be nicer still if they could assist fellow divers instead of ridiculing them, as they are doing here.
To the extent that DIR promotes advanced skills and discipline, that's really great. But skills can be learned by practice with real masters, and this ain't rocket science. This all boils down to what each of us are willing to learn on our own terms.