Can anyone help me to make this video?

I’ve literally tried everything but I really have no idea how to cover up the cube underneath and to composite if I do you can still see the part from the castle. Can you help me to make this one minute video just 1 minute?I really need this for school.

You are a hero if you want to do this . Here is the link to my footage with markers and to the model

model: http://www.blendswap.com/blends/view/69806

footage:https://drive.google.com/open?id=0B0E0F9EsCMwfMzhhSTQ1T0xUcE0

take a look!

So you want someone to motion track the clip and then put the castle on top of the desk? Why? What kind of school?

I think I’ve seen this request also on Blender Stack Exchange and it received an answer. Something to do with concealing the lower portions of the cube below the ground plane. Didn’t the answer work?

It worked at first but after rendering it has some troubles with the shadows