Way to add fanart to separate videos in same folder?

Is there a fanart folder I can place somewhere, or can I rename the fanart files to make them show up for specific videos, even when they’re in the same folder? I already know placing videos in their own folders works.

FOLDER
video1.mp4
video2.mp4
video3.mp4

Something like a FANART folder with video1.jpg, or fanart.video1.jpg?