I’m afraid that I cant help you with either Kleoptara or GNU privacy
assistant. Perhaps someone who uses those programs could jump in.
But this shows one of the problems in following video guides without
understanding them. A good guide would explain exactly what is being
done, why, and what alternatives are available. It’s a shame that the
video you were watching didn’t do this.
I assume you have read the instructions for Linux in the docs.
You need to find a way of adding the Signing Key to your keyring. I
assume that the help for GNU privacy assistant will tell you how to do
this. Alternatively you can follow the instructions in the documentation
- if you have done this but hit a problem, then please explain what that