New YouTube channel need an exposure, since YouTube algorithms are designed in a way which helps in getting more traffic in the initial phase of the channel. But that too based on the content strategy, the basic algo tool if used adequately, then one has not to worry about creating any ad campaigns to promote your YouTube channel. The content plays the vital role and how it is presented and the steps to deliver the video in YouTube. The type of license which is required before posting a video in YouTube get reviewed for 7days. Right selection of video licensing automatically builds the trust in the eye of YouTube.
And there are many more roles to perform.