My experience is in music so some of what I've learnt is different. I don't think I can give you much advice beyond "Keep friendly and welcome your public with open arms", and "learn to make everything you write sound interesting, even if it isn't".
For music I could just offer people some tracks and they'd then promote me in return. I don't think you can do that in film. Maybe try offering to trade with others - "I'll talk about you here if you talk about me there", "I'll advertise for you on my site if you do the same for me".
Every week put the spotlight on someone else's work, promote them even if they don't do the same for you. Share interesting insight, images and information with people.
My experience with social media (my FB page with 150 likes:
Normal boring post gets some views, no reactions.
Serious or funny post gets more views, one or two reactions.
Serious or funny WITH A PHOTO: Lots of views, lots of likes two or three reactions.
Promoting other people: Lots of views, lots of likes, some thanks "for showing me this epic new thing". If you do promote others, make sure it's somewhat relevant to you or what you do. I once promoted a webcomic called
StupidFox because my name and avatar is a fox, that got some serious appreciation.
My interactions with my audience are getting to the point where they are beginning to relate with me beyond just what I do, they're interested in WHO I AM. For example, I recently lost my cat and posted a photo and goodbye message to her. It was literally the most popular (non-paid-for) post in the history of my page. Conversations, condolences, personal stories... I'm not saying I did that to get views or something, but it just shows that people want to feel involved in something they like. Make them like your product/service, make them like you and you're set.
FYI, my own YT channel has only got 1170ish subscribers but my (100% original) music has been heard by nearly 2 million people because it was used by other more known people on Youtube.
Hope this helps.