You have to admit, the Big Bird in the first video was a trooper. It was barely a second before he was lip-syncing to the audio track again.
That is the mark of professionalism. He carried on the show like nothing happened. The Christmas show one looks like he might have really gotten too hurt to continue right away. But to basically sit there and finish off his long line of dialogue in the prior one so as not to worry the kids watching? That's admirable.