Great catch! We should study this video! The interviewer is a huge fan yet watch his confused facial expressions. If Alex had disclosed, it would have helped so much. 5:30 - interviewer has a repetition “d-d-do you…”. It shows how everyone has them, and that they are a not a problem, especially compared to a block and the accompanying secondary behaviors (eye contact avoidance, excessive use of hands, frequent changing mid-sentence)