mysql -u root -p –host 127.0.0.1 fails by "-bash: mysql: command not found"
Did the mysql client install successfully? I think Compute Engine VMs are defaulting to Debian 10 now, and the video was recorded at Debian 9, however there is a note in the video at 04:51 with the updated command:
sudo apt-get install default-mysql-client
Hope this helps!