https://software.opensuse.org/explore - search for filezilla
Note: You can also install filezilla with the zypper install command.
I don't
use it in the video because it wasn't available in the 42.2 repository
but
it is available in the 15.1 repository.
As is typically true, none of the below articles provides a clear,
step-by-step explanation of the process. I've pulled
information from each of these as well as from sources not provided here
(lots of googling to find resources...)