I'd just embed the video, but that would be .... counterproductive ... at this point. I'll try to update this post later with an embed. Here's the video.
He says that he fears for his life from al Shabaab over differences of sharia and strategy.
Notice, though, that the flag he flies is al Qaeda's. So, whatever the dispute is over it's not over the essential goals of the global Salafi jihad.