How do I convince my friends to delete a YouTube channel we have together?
The best thing to do in your situation (in my opinion) is to try and get them to understand that it is very important what you put on the internet. They should be concerned about this too! Even if you may not show up in many of the videos, it still might look bad that you have your name on "inappropriate" material on the internet. One way you might be able to convince them after you tell them how you feel is by bringing up your views and subscribers. You may want to say something along the lines of "Well, nobody watches our stuff so why is it even up? Can't we just have these videos privated or not uploaded at all?", Assuming you are not very big yet. I hope all goes well!
Just tell them straight up. Don’t beat around the bush.