1: Have a YouTube Account (Duh)

2: Get a Good RecordingSoftware(Like these BandiCam,Fraps,Minema)
BandiCam Link :http://www.bandicam.com Fraps Link :http://www.fraps.com/Minama Link :http://www.minecraftforum.net/topic/926293-16x-minema-20-beta3-the-smooth-movie-recorder/.

3: Get a Good Microphone (That I don't what to tell you)

4: Don't play on Big Popular Servers because they might get mad (Viewer's might think that you own that server)

5: Remember that if you make a SUPER AWESOME VIDEO it might not get seen for like a year. (It happens)

6: Be Funny, and when I mean funny I mean people laugh funny not the stupid Minecraft puns you find in the internet.

That's all folks if you have any suggestions just put them in the comments below