How can I achieve the Ken Burn Effect with greater control or in other software?
What you like to accomplish is a zoom?
In that case you can just add keyframes on the position of the video within your canvas/composition.


Find the moment where you want to zoom.
Add keyframe on the scale / position
Add keyframe on end of the zoom
Set preferred value
Add keyframe one frame before zooming out
Add keyframe on that next frame.
Add keyframe at the end of the zoom
Set the value of that keyframe back to 100% (original value)


That's it!