Help with adding video

ok people i found i video on you tube to add ur own video into blender
but i need lets say a space ship to go behind me how would i do this is there a whay to make it dissapear behind me like it would in real life??? and what are good tuts on adding videos into blender??? thnkzz

Just do everything on it’s own layer and then stackem up.
You in front, and your spaceship behind you.