This video shows you a walk through using setup provided within the course using the AMI created for a 3-nodes EC2 cluster. The instructions assume you have already done the preparation work - ready Security Group policy and key pair (the ppk file you've saved earlier).
If you don't have them, you might want to check out other videos within the AWS Educate playlist.
Thank you for watching and happy learning!
2022/02 Update: AMI image is changed - check out AMI ID ami-075b0d080c938d4df (AMI name - SunU-Hadoop-Image v1.2) if you wish to practice using the images I have created.