I never use a pop screen - it's only for singers who don't know mic skills. Just lift the mic and tilt down - the breath bursts always flow down. Then sing side on to the mic, so you are able to easily turn the head on and off to the mic in synch with the force of the voice. The pop screen does cut the sound quality, especially the highs, which is is designed to do to reduce the 's' effect as well as the 'p' effect.
But the group recording thing - yes rarely done, but always has great benefits to the feeling between the musicians. Typically they will have the drummer in another room. The bleeding between mics is the problem, making it very hard to do post-production work. I always think it looks great, and the music benefits, if not the sound.
They had a good feel in that clip.
