Crown
¯\_(ツ)_/¯
Your thumbnails must be something else if they're the thing they want to copy over the video!
They're nothing out of the ordinary, but they have a common theme and branding which makes them recognisable as one of my videos if you see what I mean. My channel is pretty well-known in my niche so he's doing it to mislead people into thinking it's one of my videos to get more clicks.