I'm trying to get some hands-on experience with 3D visual effects on videos. Similar to those AR apps, I want to add a 3D model with effects, say a dragon, to a video. Something like this famous demo:
But I don't really want to make it this fancy with camera tracking. I like to start with the simplest approach- probably just placing a dragon on the field (like its last scenes) with fixed camera.
What's the best way to do it? Some tutorials would be very helpful.