Hey Kerry,

there’s this uke minutes on the left hand mute:

Left Hand Mute

Matt also did a webcam session on the left hand mute:

Ukulele Webcam Sessions (Ep.57) – The Left Hand Mute

And Aldrine does cover the left hand mutes in UU102 on Week 7:

Ukulele 102 – Week 7: Mutes & Parallel Octaves

We also have some Live Lessons were we talk about left hand and pinky mutes. You can just look up left hand mute or pinky mute. Here are a couple of them:

[6/8/2017] Live Lesson Replay

[3/2/2017] Live Lesson Replay

If you want to play in the original key, the chords are G Flat, A Flat, D Flat, and B Flat minor. Aldrine made the songs made easy version easier to sing by making it two parts, but in the real song, they just repeat those 4 chords over and over. You can play these chords on the uke like this:
G Flat
A-1
E-2
C-1
G-3

A Flat
A-3
E-4
C-3
G-5

D Flat
A-4
E-1
C-1
G-1

B Flat minor
A-1
E-1
C-1
G-1

The G Flat and the A Flat are played using the F chord shape with your middle and ring finger, and barring the 1st and 3rd fret with your pointer. The D Flat is played like the C chord, but you barre the 1st fret. Some people play the A string 4th fret with their pinky finger to make it easier to barre the 1st fret. The B Flat is just a straight barre on the 1st fret. I hope this helps.

Aloha,
-Kahai (UU Staff)