Please help me to identify this facebook trick

Hi everyone
I have seen something in a facebook's fanpage that cought my attention and I'm very interested in knowing how the owner managed to do that, so I need your valuable help to identify that method and be able to do something similar :D: basically he post "videos" in its timeline which if you clic from a PC it plays normally (default facebook player) but If you try it from a mobile phone, it redirects you to an external web (where you can do many things to earn money ;)) can any…

Please help me to identify this facebook trick