Intro:
You just leave your index finger on the 6th fret and play the notes on the 7th with your middle

finger.

E|-----------------------------------|
B|-----------------------------------|
G|-----------------------------------|
D|--------------------------------6--|
A|--------6-6-6-7---------6-6-6-7----|
E|--0-7-0-----------0-7-0------------|

"I saw a swarm of..." part:
To get the right sound play these chords by hitting the side of your thumb against the 
down

by the bridge (this is where the video is helpful).

E|-----------|
B|-----------|
G|--2--1--4--|
D|--4--2--4--|
A|--4--2--2--|
E|-----------|