I just watched the interview without the sound or captions. (I have no idea what was asked or what they were saying.)
The mom was bouncing/jittery almost the entire time. She did look straight at the interviewer almost the entire time. Her eyebrows were up too/wrinkled forehead for almost all of the time she spoke.
SS was looking down to his right almost the entire time & when he wiped his eyes, I didn't detect any tears. At times he almost looked like he was trying not to smile, imo. I could be totally wrong but there were a few times that it just seemed that way (one time was around the 11:45 or 12:00 mark). It looked like he also was raising his eyebrows the entire time/wrinkled forehead but with the backward baseball cap hiding his forehead, it was hard to tell.
Just my observations & MOO.