I think a video is good but nothing compares with trying it and see what a modern airgun can do nowadays.
When I go to my range, we dont have airgun range, so I’m shooting side by side with a guy that have an AK47 or whatever, at first they laugh when they hear, pew, pew. Later when they see the groups at 100yds (that sometimes is better of what they are doing) they immediately switch and start asking questions.
It will be great if your friend can solve a pesting issue, or if you could find a way to show the airgun as a tool, then you can say, hey check this video and you will see how John Doe uses an airgun to deal with that.
When I looked at airrifles, I had in my mind the old break barrels I used to shoot in Cuba when I was kid, but nowadays, we have truly a marvel on engineering.