As I already said I don't own these credits. As far as I know, the uploader of the video made the killermarks, so credits to him
Other credits go to @KrisOzil for requesting the killmarks and to @makaraxD for posting them there(I made a new post since this is easier to find I think). And last, but certainly not least, ME!^^
How to?
New to using mods? no problem!
Step 1: Download the file(duh-.-)
Step 2: Extract the downloaded file
Step 3: Drag all those files(except for the picture) to "crossfirefolder"/rez/UI/Mark and replace the old files.