Your own social media outlets would be a good starting place to place links. Utilize your already existing base of followers or supporters (Facebook, Twitter, Instagram, Etc.) Then from there, you may be able to post your videos (not in spam like fashion) but elsewhere in forums such as TubeBuddy, Reddit, Niche Forums dedicated to your content and channel, etc. Then from there, interact, grow and build a base of more supporters on each platform you can. Interact with other like-minded channel content creators on silimar places, like Facebook, Instagram or YouTube. Especially smaller accounts, show support and connect and in turn it could also impact and positively grow your channel or brand!