People are curious by nature and they like to see what other people are doing with their lives. This is the reason why reality TV is so successful. What are the ordinary people doing out there? What are their hopes and dreams? What excites them and how do they go about their day?
It doesn’t matter that someone doesn’t know you. You have a message to share with the world and a vlog is a perfect way to do it. Sure, you could create a conventional blog and write posts about your life and share your experiences. But people prefer video.