On Hextube some people like to say "Amuroooo" in the chat when an episode of an anime is over, in reference to this. That's how I was introduced to this song, when I first participated in one of their watch parties two days ago. I asked what "Amuro" meant and they were kind enough to play the song for me so I'd be at least a little more in on the joke.
Sent from Mdewakanton Dakota lands / Sept. 29 1837
Treaty with the Sioux of September 29th, 1837
"We Will Talk of Nothing Else": Dakota Interpretations of the Treaty of 1837
I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy: