the video only demonstrates how you should install the RPA component. You should not use the same hostnames, users or passwords that are referenced in the video. As a prerequisite, you should install your own database server, which will have it's own hostname / IP address. The logs clearly show that you are using rpa.microfocus.com as your database hostname. This is just wrong, since this value was used to record the demo and you should replace this with your own database server hostname.
Please refer to the more detailed information on the installation process here: https://docs.microfocus.com/itom/Robotic_Process_Automation:2020.02/InstallCleanDesigner