Let me explain myself. Every monday, VEVO management send me an email with the schedule of music videos, lyric videos and audio video that are expected to be released in the week. Usually the artists and the label release the video (like last week when I got the confirmation of Pretty Hurts, Birthday and Hello Kitty), but sometimes they change their minds (like last week, when I also got that confirmation of West Coast).
This is from VEVO Brasil: