where his/her main content is mostly Minecraft
. May or may not be good at making videos. This can be applied to anyone, any age, anywhere in the world. The worst examples are the pre-teen, squeaky-voiced, low talent YouTubers that probably have their microphone sensitivity too high, too low, spends 75% of the video rambling, have voices that are mostly unbearable, and most likely haven't found out about a screen recorder, so they use the worst camera in existence to record.
SkyDoesMinecraft is an example of a successful, mostly liked Minecraft YouTuber, but for every one good Minecraft YouTuber, there are at least a 100 bad ones.