Even if he were especially tense during those moments (and I'm not seeing it, relative to his tension throughout the interview), your interpretation is a huge stretch from a tiny piece of data.  There are many alternative explanations.  The moments you cite are exactly those where he's laying down google's gauntlet.  He was on national TV, claiming that it is no longer possible to do business with a powerful nation because its representatives have been suppressing  opponents to its totalitarian policies with highly illegal and unethical tactics.  I would be pretty tense under those circumstances, too.  Every person of Chinese descent I met after that, I would be wondering what they think of me.