I couldn't hear anything from the video and the camera shake didn't help. But if during this issue the car goes "thunk-thunk-thunk-thunk-thunk" etc. on the order of approx 1/2sec between thunks, then this may be similar to an issue with the 2010 Forester diesels. Ours only occurred once or twice very early on in its' life. Is yours a EURO5? If so, then there should have been a software update to fix the issue- at least I think this was the fix.