sorry to tell you but if you want a decent minecraft intro for free, you probably wont get it
here are the ways you get a good minecraft intro:
you can get one for free if you have maybe 500+ subs
you can pay $10-20 and get a good one
you can ask and HOPE that someone might give you one for free, but it probably wont be good
the reason for this is that most good minecraft animators already get tons of paid work so they dont have time or just simply dont want to make them for free. good luck on getting one, anyway
I happen to be a MC animator myself but stopped a while back because they take so unbelievably long to get the lighting, mats and animation right