How to display extras correctly?

[Arete]

1. How can I make the image for this extra video not be the same as the cover for the movie? It's confusing. Plex just shows a thumbnail.
2. How can I make the extras show as horizontal thumbnails as opposed to 1:1.5 cover images?

   

   

[theguymadmax]

Is the special feature in an extras folder?

Movie (1999)\
   movie.mkv
   extras\
      interview.mkv

[Arete]

Is the special feature in an extras folder?

Movie (1999)\
   movie.mkv
   extras\
      interview.mkv

Yes. But I have it added inline in the same folder as the movie as per the documentation. So it is named 

Code:

Ghost in the Shell (movie) 1.0 vs 2.0 Comparison - Selected Scenes [UJT0mLi23Ag]-other.mp4

[theguymadmax]

Move it to an extras folder. You most likely have a poster image in the main folder that Jellyfin is using for both.