I could maybe make a texture pack for you and I could also make you some channel art. That's only If you want me to. I am also going to have the same problem because I am not sure what to do when I hit 400 subs. I am releasing my 3rd texture pack but I ain't sure what to do.
I could make you a banner but you might need to send me a link to your mc skin. Also I will try and think something for you to do video wise
I am on my phone so could you create a conversation with me and send it so that when I get on my pc I can view it because I am currently on my phone