Creation of a short video by extraction of object in video 1

Hello,
I'm a user of the free version of Davinci resolve and I want to extract a moving drone
in the field of view of saying video 1.
Even if I use an elliptic mask and tracker it appears that I don't succeed to obtain my new video !....
Does anybody knows how to realize the correct fusion project ?
Perhaps a tutorial ?

Hoping a response

Hi Franck, it sounds like you're really new to Fusion/the Fusion page. Before going into details you're probably best of doing a couple of existing tutorials to get the hang of what Fusion is.
There is courseware from BMD that's freely available and there a couple of pretty good Youtube videos to help you get started.

Hello,
as you speak about some tutorial on the subject of tacking masks, could you
give some youtube link ?

Here is one that I did. Part of it involves tracking a mask.