You can regain your locks in two ways: naturally, or artificially; of course, depending on how you lost them. To regain hair locks naturally, you just let them grow free without brushing or combing them, and in a few months time, you will begin to see results. However you might also want to take care of the lustre and size by regular creaming and trimming. To regain locks artificially, a hairdresser can easily fit artificial lock extensions on your existing hair, facilitating the blooming of attractive dreads or locks. I believe the content in the question's youtube video is also worth a consideration.