In http://xibo.org.uk/manual-tempel/en/install_docker.html - you're installing the docker environment (which at this point has nothing to do with Xibo yet) - depending on what system you're using you will want either docker toolbox / docker for windows / mac / linux.
I assume you're installing it via docker toolbox, since that's what you've quoted from manual, which means you need to download it and then start the installation - toolbox comes with .exe (side note docker for windows comes with .msi) ie those are the installers.
Once you have that running, you have the docker environment.
So you go to http://xibo.org.uk/manual-tempel/en/install_cms.html
which comes down to downloading docker image, making changes to config.env and running a single command in Docker Toolbox Quickstart Terminal to set it all up. that's it.
Then if you need to change ports or open it to be available from other devices, add ssl etc you can do that, but it's not strictly required.
It really comes down to pretty much 3 steps
download and install docker environment
download and install Xibo docker image
(Optional) configuration for ports/ssl etc
It doesn't really require to constantly jump between the two manual pages, as you install the docker as per instructions on one page and then install Xibo in your docker environment on the other page.
I don't think there is a problem with installing Xibo docker, as that's literally one command line, perhaps the issue is with the docker environment itself - in which, please do tell us where exactly is the problem?
If you do not want to use docker, then by all means, please install it on the environment of your choice as per instructions here - http://xibo.org.uk/manual/en/manual_install.html - it will require more steps to get it all working, but it is an option - we do not strictly say that docker is one an only way to install Xibo (we just recommend it), as mentioned a lot of times in various topics on this very community site.
I don't believe you have be an expert to install Xibo in docker or otherwise, I also haven't read a single exact issue that you ( or Ben ) are facing, I appreciate that instructions are not clear for you, but if I don't know where is the problem in your case, then it's rather hard for me to say what went wrong.
It's certainly possible that such content will be created, but that would most likely cover docker installations, as I don't see us covering every possible server environment installations in videos.