From my own sad experience, I can say that you need to be careful using bots, because they can ban the channel. I lost two channels
Now again I understand how to bypass such difficulties.
I'm trying to use cyclic streams - the application from https://gyre.pro/ it allows you to promote such streams over and over again. You can also use videos from Instagram, Facebook and other social networks. And I also recommend reading thematic articles on Gyre.