My guess is that you're using YouTube based communities... And in those communities, specifically, a lot of people are only there to promote, not to find new content. That being the case, Google will tell you WHO +1d it, thus giving them the exposure.
My suggestion would be to get into communities relevant to your content, not your platform. If you read creepy pastas, for example, you might want to join a literary community, creepy pasta fan club, or something related to horror etc. If you're a gamer, try a gaming community. Remember to get involved! Don't just be there to get views. Interact with people. Build friendship or at least commonality.
I hope this helps. I don't know if I presented it in a cohesive order, but... yep!