There are audits that try to determine if the view credits are legitimate. They’ll cross reference a selection of data (what segments did they fetch, what was the timing like, did each ad checkpoint get crossed, etc) because companies don’t like paying for ads that arent watched.
That can all be faked, just grab all the segments at a timing that would match playing it. This is why Google wants to do that trusted client thing, because there’s no way to guarantee that a user is watching something on their own device unless the software and hardware on that device prevent it and the server makes the user prove they are running that software and hardware and nothing else.
There are audits that try to determine if the view credits are legitimate. They’ll cross reference a selection of data (what segments did they fetch, what was the timing like, did each ad checkpoint get crossed, etc) because companies don’t like paying for ads that arent watched.
That can all be faked, just grab all the segments at a timing that would match playing it. This is why Google wants to do that trusted client thing, because there’s no way to guarantee that a user is watching something on their own device unless the software and hardware on that device prevent it and the server makes the user prove they are running that software and hardware and nothing else.