I stay positive because even if no one watches my videos I still had fun making them. It know it takes time to grow there is only so much you can to to move things along. Just remember to enjoy what your doing.
Depends on your goal and what you are seeking to do? I am excited when 1 person watches my content. I like to call this my first love. Why would I call it that? Because when you start with your first love everything about them gets you excited, the smell of them, the site of them, the sound of them. Sitting next to them gives you joy. Don't lose that in all the analytics. Slowly improve what you are doing and remain excited when even 1 person watches. Why because you are impacting that one person and that is worth it!
Another way is to have people come alongside you and encourage you. Have a close friend to talk through your struggles etc. Hope this is helpful!