I'm no radiologist or neurologist but it looks like a pretty normal brain to me.
Same. Though the GIFs are a bit too fast to take an accurate look.
I had an MRI taken recently, and was surprised as well about certain white areas in the sagittal view.
Family of mine is a neuroradiologist and confirmed that they were merely venous blood vessels, not lesions.
They were also more or less in the same areas as those on your sagittal view.
So chances are this is your case as well; though again; I'm by no means a professional.
When do you get the result?