How Excellent Is Thy Name

I love this song, " How Excellent is thy Name," by Walt Whitman. I've used to lead this song all the time when I was on the youth choir. I did not however sing it the way this singer in this song sung the song, it's too high for my voice. I have  a soft voice that would crack trying to go extremely high and it's not healthy than your required voice range, you could damage your vocal cords. Well anyways here's the video: