This method of hiding chests is good for lazy people who don't want to open fancy doors or break through walls. It's immediately accessible!
I don't know if this video will teach you anything, and I don't know if this video is actually worth your time. In fact, you should probably just leave now. It'll be better for the both of us, I promise.
This video is totally useless if you play on a modded server with locks. Just kidding, this video was totally useless before that.