I like the theory that it’s some kind of patent farm where they just make up all kinds of outlandish inventions so they can patent ideas that might one day become useful.
Youtube channel Retsupurae did a whole series where they’d watch Dahir Insaat videos and comment on them, but they got taken down.
Some kind soul has mirrored the videos on Google Drive, “Coffin Bed” is probably my favourite: https://drive.google.com/drive/folders/0B8ENGke08-ClaDVZZnFRTHZXWkk
