The both of us thinks that the video is trying to tell others not to post things about yourself on the blog. Things that are very personal to you. Like, your address, telephone or handphone number, school and many more. Things like what you like, what you do and what you wear that day are all personal stuff one should not post on his or her blog. It is all stuff one should keep to himself or herself.
Personal stuff should be kept private and never leak our any secret.
