How can I make professional graphics for use in videos?

Andrew makes Minecraft videos on YouTube and wants them to look more professional. Leo says most professional work is done with 3D graphics. There are a lot of different ways to do it and it's not easy. That makes a good project for Andrew to learn with, though. Most professionals use Adobe After Effects. A free one is called Blender. It's harder to use, but if he can use that, he could use anything.