To be more specific, he said that "the Galaxy S26 Ultra prototype does not show a screen hole for the camera." This indicates that at least one of the prototype smartphones has a camera under the display.
Samsung has been using cameras under the screen in its Galaxy Fold series of foldable devices for several years now. This camera is visible from certain angles if you look closely.
Many manufacturers do not use under-screen cameras because of their quality. The under-screen cameras are currently inferior to regular cameras in terms of image quality. However, some users are willing to sacrifice this quality to avoid a hole in the screen.