How to make minecraft channel art for youtube?

I have search for ages but I haven't found anything please help I need channel art.

We use photoshop. Any photo editing software will do, even paint. The easiest way if you don't want to get into spending money on software and don't have anything besides paint would be to do a screen grab - press windows Key+PrtScn of the shot in your video that you want. Transfer the file from pictures/screenshots folder into paint and just add a title. The thumbnail on this video

is done pretty much as I've described.

Give us some more information.