[How to] Zoom in and out in the same video sample

So I always use FCP for my projects, I'm just wondering if I will be able to zoom in and out in the same video sample.

I made a video explaining how I do it in Camtasia, wondering if theres is a way to do it in FCP too? I try Transform and Ken Burns but is just not give me the effect I'm looking for.

Video explaining what I'm trying to do:

P.S.: Sorry my English, was just a fast video to try show what I'm trying to do.

Try keyframing the crop/crop function.