Let's try this. See if you can work it out if you start in the middle.

I listened to as much of that video as I can stand, and I'm gonna make a MIDI of the phrase 'Ave Maria, tum tee to you.' I'm gonna put it in the guitar-friendly key of D. You figure it out in D, then transpose it to whatever key suits your voice.

I'll send the snippet to Joe, along with the names of the chords. If you need help changing the key, get back to us.