you must try to get as much people to view, like, fav and comment on your video.
this means you have to make people cause traffic by you posting your videos everywhere, facebook, twitter, tumblr, etc etc
later, if you are aiming it to be based on hong kong audience, you could try labeling your videos instead of in the english language, try for the language you speak in and also do the tags in that language, many people do not know english and would type their own language when searching and that's how you can get the views from that country. hint *you can add the key words "hong kong" in all of your videos*
third you can do fun and exciting commentaries in the hong kong language to get people more intrested and to watch the video to the end
and finally have fun with you videos
good luck