MacOSX Safari: Play/Pause, Rewind & Fast Forward in Youtube Videos also works with VoiceOver

Nearly everybody has been in this situation: We’re watching or listening to a Youtube video and then…the telephone rings, our cup of coffee is empty, the cat is attacking the Jehova’s Witnesses at the door who want to talk to us about God…
anyways, we wish we could pause this Youtube video…
Read on how to do this via keyboard.