You can promote your video anywhere you want. But if it doesn´t work, it doesn´t work. Don´t keep insisting and spamming your links on different places. If your videos are good, they will get views naturally because people will share them with their friends, and in that case, you don´t need to spam your links.
The problem is that we see people spamming their links over and over again through twitter, facebook, reddit etc. At the end of the day, they end up with 200 or 300 views. What does that mean? That nobody cares. If nobody cares, you should give up or completely change the content you´re creating. Nobody is going to become popular or well known for promoting videos on social media.