Met thinks this is her best work for a thumbnail
https://www.youtube.com/watch?v=QsW5ef7TRuw&t=2174sI highly recommend watching this collab about the vtuber thumbnail roundtable. It's really funny.
It all started by Tamaki mocking the thumbnails work that Roberu, Maiymoto and Haneru do for their videos.
After that two new challengers appeared in the first Tamaki and Met collab.
https://www.youtube.com/watch?v=WSswk9ofXs0Met also shows the great work that Nanashi does as an example for Met to make the thumbnails.