Universal Media Server | Forum

Im wondering how to show video covers, like plesk does?

You can generate your own covers using:
http://www.worldinhidef.com/ps3ms/thumbnailgenerator/

Then save the image into the same directory as your films and rename the image to match the filename of the film exactly except the file extension of the image will be .png. So in your directory you might have for example:

MyFilm.mp4
MyFilm.png

UMS will then pick those the png files and display them as the thumbnail.