I have followed the steps to change the cover of a series of documentaries, and it is not changed.
I have tried the following options:
Putting the jpg file directly where all the video files are placed, and the jpg with the same name.
PLANET EARTH II.S01.E01.mkv
PLANET EARTH II.jpg
I have also created a folder called PLANET EART II, and I have placed inside all the videos and the jpg file with the same name, I have also tried with the name cover.jpg and the image of the cover is not changed in any way serial.
How could I do it?