Korea's Got Talent Connection

[Sempu]

So this video: YouTube - ‪[Korea's Got Talent] tvN is viral by now. Very moving, but what is the Avatar connection, you may ask?

I looked up the lyrics to his song (which I had only heard before as the instrumental theme from The Mission). I'll let them speak for themselves:

In my imagination I see a fair world,
Everyone lives in peace and in honesty there.
I dream of souls that are always free,
Like the clouds that fly,
Full of humanity in the depths of the soul.

In my imagination I see a bright world,
Even the night is less dark there.
I dream of souls that are always free,
Like clouds that fly.

In my imagination there exists a warm wind,
That breathes on the cities, like a friend.
I dream of souls that are always free,
Like clouds that fly,
Full of humanity in the depths of the soul.