Unity Shader for removing video background

The plugin below tries to remove the background of a video, only leaving people and getting rid of everything else. [login to view URL]@natsuite/robust-video-matting You need to create an account for free in order get an access key. Otherwise, this plugin will not work. And it only works on mobile phones. The unity package on the website includes a sample scene. However, it does not remove the background of a video. It just dissects a video into two parts. 1) Black: this part needs to be removed. 2) White: for people (this part needs to remain). The next step is to write a shader where it removes all the black pixels and leaves the white pixels. In that fashion, we will be able to remove people's backgrounds (think about Zoom background removals, TikTok background removals, and etc.). Let me know about your experience with writing such shader scripts. Thanks.