For now it's a kind of autoencoding, regenerating the same input video with minimal changes. They will refine the pipeline until the end video is indistinguishable from the original. Then, once that is perfected, they will offer famous content creators the chance to sell their "image" to other creators, so less popular underpaid creators can record videos and change their appearance to those of famous ones, making each content creator a brand to be sold. Eventually humans will get out of the pipeline and everything will be autogenerated, of course.
Maybe in the future someone will come up with a method for putting realistic text into images so that they can generate data to train a model for putting realistic text into images.
Or the content was never supported by Steam, per their policy. You can check Wayback machine for support for my position. Dod you have any evidence of Steam's motive otherwise?
Given that fact we have two options: either they decided to change their approach to content moderation and remove games that previously passed all their checks, with these games being coincidentally the same that were requested by Mastercard; or they decided to remove every game requested by Mastercard regardless of Steam's own policies.