if you're going for the soulless route just put cleavage or something sexual in your thumbnail, all the pervs will come flocking to you ... ... ... if you're going for the self respect route then have a creative/clever/funny descrption in your vids, someone has to want to watch karate walrus licks barack obama in the no no zone.
gaia is a good place to advertise your videos and channel as it causes lots of taffic to your channel therefore more viewers which could lead to subscribers.