All in Em, The only thing he does is playing a few extra notes to make the melody.
Em is played in the D shape with the thumb playing the open E all the time. (see image below) by replacing the b3 by a 2 and 4 it creates an Em - Esus2 and Esus4 chord all the time.
![](https://static.wixstatic.com/media/a27d24_a19bca3074224539a1ac8763f4c4e10f~mv2.jpg/v1/fill/w_137,h_85,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/a27d24_a19bca3074224539a1ac8763f4c4e10f~mv2.jpg)