Video thumbnail question

[bulldozer]

I know that you can't do video thumbnails in Coppermine yet. What I have done for now is to put images in each video directory called !cover.jpg. Then, for each video album it will show a picture instead of default image.

The problem I've having is that, the picture isn't showing up for all album covers. They all seem to be arranged first in list, so I assumed that Coppermine is taking image from first image in folder. However, this doesn't seem to be case. Does anyone know what I'm doing wrong? Some of the albums have pictures, but some don't, even though I have them in folder.

I orginally thought ! would be higher up in list, but it appears that 1000 beats that and 1 cover.jpg beats that.

-I see that you can specify image for each thumbnail under properties, that helps.