http://bugs.winehq.org/show_bug.cgi?id=12474
--- Comment #2 from Clerc Mathias tlarhices@gmail.com 2008-04-10 00:27:19 --- Sorry for the lack of details.
On the right part of the screen there is a file browser. Use it to go through your hard drive to find any video, picture or flash animation. Drag and drop the file to one of the 4x5 boxes, a thumbnail should appear (does seem to work from time to time) just click on the thumbnail, the video/animation/picture should be shown into the layer box (the 3 horizontal lines) and into the preview window.
I'll attach 2 screen shots for a better understanding. Choose the one corresponding to the layout of your resolume (depends on the screen resolution)
If you are using the software in trial mode there is also a small logo that should appear from time to time in the center of the preview window.