I start Safari, and after a few seconds, I hear what seems to be the sound from a video. (Sounds like a british guy playing minecraft) There are no windows or tabs open to YouTube or any other video site. The sound keeps playing as long as Safari is open. Closing tabs, clearing cache, clearing history all have no effect. The sound only stops when I exit Safari. When I start Safari again, the sound starts again from the beginning.
What is going on? How can Safari play a video if no tab/window is showing a video/video site?
Edit: And how do I make it stop?