Motion tracking

How to Add a space ship in the sky through Motion tracking in blender
I searched for many tutorial but there was none

Welcome :tada:

…you may toss your search engine… or adjust the searching key words…

This is 9 years old:

…or anything from: DuckDucjGo: blender adding object into motion tracked scene ??

Since flying objects do not touch the ground the tracking is usually only used to stabilize the camera footage… so you might not even need tracking… or only a very simple track… or even just “guess” the perspective… ?