The option Disable video in post listing doesn't work together with FJ Stack: Posts.
It still shows the video as the "Featured Image".
With normal post lists based on category for example, it works as expected, featured image is show, not the video.
I tested it by using a featured image and an image in the post itself. Either way, the video is shown.
FJ Stack: Posts example Here
Normal listing based on Category: Here
It's the last message "Recordaantal (40.006) lichtjes voor herdenking Q-koortsslachtoffers" (use load more)
Don't worry there aren't that many messages there yet :-)