Here is a comment that was left by the poster of that video...
"This is a wild rabbit in the Ohkuno island in Hiroshima Prefecture in Japan.
(Strictly speaking, I think that the pet made it to the wild.)
This iland is called "USAGI-JIMA(rabbit iland)", because so many wild rabbits live in this iland. So, their natural enemy is few, they live here very peacefully."
I stumbled across that when I was watching videos of Hiroshima... and I gasped when I saw it! I drew a picture of a bunny facing out of an enclosure that looked EXACTLY like that when I was a child! Sure looks like the rabbit is starting to come out of his hole to me!
(By the way... that drawing was turned over to a psychiatrist along with other pieces of my childhood art to be "looked over" and never returned back to me!)