HAWAII ROMANTIC GUITAR ~ BY RODRIGO.

I am listening to this tune since the last 30 years. I want to know more about it. Is it just a tune or a song behind it?
http://www.youtube.com/watch?v=YWoUMFc6X4M&feature=related
It was a miracle for me to have found it on you tube from countless tunes when I did not even know it by the name! God is great!