Hi dear Cloud sisters! :) Let us all help Rain by watching the teasers only on the official YouTube Channel, which is at Loen Entertainment. The most efficient way is to make a playlist for automatic play.
However, there has been word from our Cloud sisters that the playlist should not only contain the teasers of 30SEXY and LA Song, as it will be read by YouTube as spam, thereby won't be included in the total count. You need to include other 3 videos to your playlist for it to be valid.
Here's is an example of what I did: https://www.youtube.com/watch?v=VDcE9Le7xWE&list=PLl6u5yrY7ZUbPz9cz7YUXifJp0Hzpkm-X
Feel free to make your own playlist. Remember to include only official MV's from Rain. Spread the word everyone. Feel free to copy paste what I have written.
Read more on the official YouTube statement regarding spam here: https://support.google.com/youtube/answer/2801973?hl=en
Thanks for reading my short post and Happy New Year to you.