Is it difficult to promote YouTube channel?
It is not difficult but it requires effort. There are many proven techniques, such as posting on your social media other than YouTube as soon as your video goes live. You may maintain a separate blog for your channel. Generate a YouTube playlist or use call to action option.
Make segments, series, and related videos. Assemble content around a list of related (yet extraordinary) keywords. This is one way of real YouTube promotion.
YouTube Promotion is the key to win more subscribers.