Thank you for your sharing this video and let us know they performed very well and showed they are professional performers even such damaged technical issue. However, I never know why they often happened such techical problem and the techican had not checked seriously in advance. I wonder if they were Eason chan or Andy Lau, the technican should checked again and again and such huge issue have never happended. It means that they did not take care Mirror or Mkv since they have not in the top position in this industry.