How to expan mask (shift) by % for whole key path, when its used already? (video)

[#1]

And is there any better way to acheve this key path without manual frame to frame key lock (as in this case needed a lot)? Some kind of ai light tracking (as it comes from black) auto mask creation i immagine with adjustions based on intensity etc. And if so, how?

https://vimeo.com/484853000

[#2]

And is there any better way to acheve this key path without manual frame to frame key lock (as in this case needed a lot)? Some kind of ai light tracking (as it comes from black) auto mask creation i immagine with adjustions based on intensity etc. And if so, how?

https://vimeo.com/484853000

[#3]

Next to mask path, there is a play button, that will automate the mask, but it will need some fine tuning though

[#4]

It's already done there, instead i just reshaped from point a to b to.. the final step that i looking there to expand whole mask as it is unit from itself including all of these from a to b, as it would fix all in between that there still a lot, after giving it more shadows hopefully with feather etc.

As well one question i want to add but if its more for another topic just igonore it

However ir relates to the same project and video i posted:

  How to black background fade in to corners/or media fade out to black background, including giving it shape circle.

[#5]

Or..How to remake mask by mask tracking so that mask size would increase and decrease, as its in every frame difference basicaly, fixed mask not an option, only if lets say squere, but size bigger or lower including possition changes.