What is the proper way for multiple people to enter the subway at the same time?

So normally When I have to swipe multiple people in the subway I go one at a time. I swipe and the first person goes, I swipe again and the next person goes, and it continues until I'm the last person. However, I saw a video from CaseyNeistat showing him swipe three times for 3 passengers and they all entered at the same time. I never knew this was possible until now. Which way is better and which do you guys use?
 
Video