Okay I thought this was computer generated visual effects at first but it’s not it’s special effects makeup if you look close you can see the actor’s mouth covered in blackout makeup it took many specialized Crafts People to put this look together with the exception of an orthodontist Video Information
This video, titled ‘Creepy Good Practical Effects Makeup’, was uploaded by Scott Prop and Roll on 2023-08-07 00:06:56. It has garnered 105270 views and 7452 likes. The duration of the video is 00:00:17 or 17 seconds.
Creature design by Chris Devitt, makeup effects by Masters FX for the Nancy Drew series