(a) Ninja 10-in-1 air fryer: The creator demonstrates its physical features (opening the doors, showing the interior, displaying the control panel) and explicitly recommends it as a purchase, which makes it the subject of the video. Removing it would remove the entire purpose of the content. (b) SharkNinja: Appears as a tag in the caption and a brand name on the product itself; removing the tag would not change the video's function.