A few assumptions that were left out of the video:
Ubuntu 16.04 - Worked out of the box
RHEL 7.3 - needs more work: "sudo yum install cifs-utils"
Centos 6.8 - Unable to get working. I get: "mount error(112): Host is down". I have verified they are in the same geographic region, installed cifs-util, tried -o vers=2.1, and added the host to /etc/hosts, but no joy.
I also tried it on Ubuntu on Windows; however, it didn't work there either. Not surprised as not all networking features are supported.