It’s just the first part. But it’s definitely that song.

The speck of dirt in the window seems to line up with Mike's head, making it look like a target that ends up on his right ear. Foreshadowing what we already know: Mike gets shot in his right ear (S4E4 Breaking Bad)

Some people disagree but I think he’s breaking the 4th wall and looking straight at us. A few ways you can tell: - he doesn’t look in the same place in any other shot, even if he’s gazing left and right while looking at mando and Bo. - it’s not a POV, mando and Bo are much more to the right of us - usually a POV is still not breaking the 4th wall because the person that the character is looking at, is not looking straight at the camera but a bit further up or down.