That looks like someone in the gallery is manually fading that up and changing the position on screen dynamically with what is on the screen..
I have thought that but I'm not sure, sometimes it does fade out when something is happening on a a certain part of the screen but it might just be coincidence. The video below from one of the matches shown tonight, doesn't seem like its being done manually to move away from any action.
They also have 18 channels which could be showing live sport, so it would be alot of work to do manually, then again its is Qatar so I'm sure they could find someone to do it!
The device burning in the channel DOG
could easily be programmed to do that as well if it's sophisticated enough.