It’s a concertina, but cool video still!
I think that it is real. I’ve seen a video of a young Swedish woman calling cows with a unique form of singing/ululation, and it’s apparently a method used in Swedish farming. So, cows DO seem to have an affinity for human “music.”
“It’s a concertina, but cool video still!”
Also her musical skills are very good on the concertina. For what, she looks to be 8-9 years old?