“OK, the butler’s setting the table,” the YouTuber Ryan Wass begins, skeptically.

In his video “American Reacts to ‘Dinner for One’ (First Time Watching),” which he uploaded 11 months ago and now has 180,000 views, Wass takes a look at the beloved cult comedy short on the recommendation of one of his followers. It’s part of a longstanding tradition for the creator: On his YouTube channel “Ryan Reaction,” Wass films himself being introduced to local German idioms, customs and old movies and TV programming from the perspective of an unwitting American viewer who responds with confusion and awe.

But “Dinner for One” is no ordinary slice of quirky German culture. The 18-minute, black-and-white comedy of manners, filmed in 1963, is about a quintessentially British butler orchestrating a solo birthday celebration for his 90-year-old employer, the cheery Miss Sophie (May Warden), whose closest friends and customary guests have all long since passed away. (The butler, James, played by the comedian Freddie Frinton, is obliged to fill in for the missing attendees, including quaffing each of their drinks.) It’s very British in style and setting, and, apart from a brief German introduction, the action plays out in English.

“I have more questions than I did before it started,” Wass says as the screening comes to an end, burying his face in his hands. “Like, how is this a German tradition?”