Although I vote for 反方, I still think if people behave "normal", no one dare to take any pic or video. And there is nothing to afraid to being post on the youtube.
seriously如果你係預算會公眾發放的話係要人地同意架。eg London Drugs有個攝影比賽係歡迎D人submit自己D日常相,裡面有一個條款係話要相中人同意仲要declare先submit得架,可想而知響未得人同意之下影人仲擺上網係要負上一定的responsibility。呢樣野係做professional video/photo都會知啦。第時你見到有人亂擺你D相你係可以告得入架!不過要睇你本人值唔值錢喇,B仔你可以賠得50蚊,大C姐就賠得50萬(假設人家夠高貴),gum你就梗係告都費事,大C姐梗係告到去閻羅王都告啦!
True. So the fact is everyone taping others and for further publishing without ask for permission will face any possible lawsuit matters afterwards. Everyone is free to take their own risk.