Beyond the bad acoustics, I think the real issue may have ultimately been the conductor. Those movements are more confusing than helpful, and seemed out of sync with the song.
But like everyone else, I don't want to be mean to researchers moonlighting as musicians. She did the job in terms of depicting what they think the music basically sounded like, and it's not reasonable to study conduction techniques for 4 years just so your team can make a better YouTube video.
That's not a fair or relevant comparison. The OP is about ancient Greek music: the choir is singing a song derived from very old sheet music. The link you have is contemporary music inspired by Greek tunings. It's not at all the same thing.
But like everyone else, I don't want to be mean to researchers moonlighting as musicians. She did the job in terms of depicting what they think the music basically sounded like, and it's not reasonable to study conduction techniques for 4 years just so your team can make a better YouTube video.