“Monetization” means making money from something, in this case, Mojang Studios Minecraft intellectual property.
Creating Videos of Mojang Studios Games
You are allowed to create videos of Mojang games, upload or stream from YouTube or other video sites, and monetize those videos. It's free advertising for us, and we like watching you play our games!
Visit account.mojang.com/documents/brand_guidelines for the most up-to-date information on monetization, and account.mojang.com/documents/minecraft_eula for additional customer usage legal information.
Using the Music in Mojang Studios Games
You are allowed to have the music from Mojang Studios games playing within a monetized video showing the gameplay of Mojang Studios games. The usage of that music outside of normal gameplay may be restricted (see below). Here are the artists’ policies on the use of their music:
Minecraft music - C418's music policy