skan: ACTS - the video is about skincare and the creator is applying a product, implying it's part of a routine to achieve 'glass skin'. The creator thanks 'skan' at the end, suggesting it's the product being used or recommended. Removing it would change the context of the skincare advice. azelaic acid and tretinoin: APPEARS - these are mentioned as ingredients for glass skin, but are not presented as specific products being acted upon or demonstrated. Removing them would change the specific advice given, but not the core action of the video.