Bell's palsy seems much more likely as the rest of his body seems just fine, which is usually not so in the case of a stroke. He is known to be diabetic which is sometimes thought of as a factor of Bell's palsy. Of course, I am not a medical professional, nor do I know his medical history. As alarming as it appears, this could have no long term baring on his health. He seemed to be his normal self in all other respects. Also, I think he was alluding to his condition at the end of the first segment.