I have three boys myself. Each was born with a different personality. Some kids are more active and louder than others. Boys especially are highly energetic. As someone else said, it’s the parents’ reaction that matters.
I watched the video, too. The mom did her best to keep her toddler under control. What did people expect - for her to beat him on-air? For squirming and fussing? They did what was best by moving him off-air. I’m guessing Diane Sawyer talked the mom into bringing him on-air.