How To Install Ubuntu Server in Oracle VirtualBox
You do not need to use VirtualBox for this. You could use a physical server, if you happen to have a spare one lying around. You could use VMWare which is equally as good (except VirtualBox has a nicer price tag - i.e. it's free).
There's not a huge amount to be said throughout this video so much of it is in silent. I have shortened some of the sequences to show only the relevant command inputs / choices, rather than making you suffer through watching hundreds of files download one by one.
MAC Address Refreshing
The biggest point to take away from this video is that we will be using this as our Master Image throughout the rest of this course. That is to say, whenever we are going to create a new Ubuntu Server to run an ad-hoc Ansible command or Playbook against, we will use this Master Image as our starting point.
It's important to create a unique MAC address - as demonstrated in the video - whenever we are going to clone from this Master Image. Otherwise we may end up with multiple Virtual Machines that all think they are using the same network card. And your DHCP server will not appreciate such things.
Aside from that, this is pretty much plain sailing next > next > next > finish sort of stuff.
But the video is here for completeness anyway.