By far the best way is to leave good comments on similar clips to yours. If you don't like one, then NEVER leave a bad comment, it'll have all their friends & relatives giving you a hard time. Before too long you'll fing they subscribe to you if you have a good channel. I've been with you tube since 1997 and have had over 3,000,000 hits. Start your own fb page and have similar minded folk as members.
If you can get any plays on local radio that would also be an enormous advantage.
It will take time and only a small % on yt go viral. Just work on ways to try & entice folk to watch clips.