Postprocessing frame showed with VideoTexture

Hello There!
I would like to ask to you if threejs is able to postprocess video frame showed with a VideoTexture.
In deeply, i would like to know if it is possibile to make ‘Transparent’ each white pixels of the video-frame.

The effect should be like the green screen of the 'Meteo Program"
Thank you and have good work!

Hi!
Do you mean something like chroma key?
https://www.shadertoy.com/view/4s3SD4

Exactly, i just found chroma shared few minutes after posting my question.
Thank you!