Summarize:

Tell anyone to check your videos out. Also subscribe and send friend requests to a bunch of people on YouTube. Make sure you respect all of your subscribers and answer their comments. You can also use social media sites to grow your fanbase such Twitter, Reddit, Facebook and Google Plus. Once you get a decent amount of views, make and add more content on a regular basis. Make videos focused on you, your friends, pranks, randomness, etc. Or keep building on your original storyline, such as the adventures of your puppy, the learning curve you experience cooking healthy food or the challenges you've set yourself to learn something new. It can take a while to build up popularity and it really is a waiting game. If you think too hard about being popular, it can do your head in and you may give up. Instead, keep persevering, adding quality material and expect more interest in about six to twelve months time. Of course, after a year has passed, if you're not well known despite doing all you can, you need to reassess what you're doing.
Tell all your friends and family. Don't leave your fans hanging. Be persistent and patient.