The study uses these structures for "one-way microdroplet transfer," showing a droplet (approximately ) on a square array being transferred to a hexagon array.
Based on the provided search results, the video "18179.mp4" (and related files 18177-18178) is supporting information for a 2020 study published in the journal ACS Applied Materials & Interfaces titled "Heterogeneous, 3D Architecturing of 2D Titanium Carbide (MXene) Nanosheets" . 18179.mp4
The structures are engineered to repel or destroy bacteria (antibacterial/antifouling tests are mentioned). The study uses these structures for "one-way microdroplet
The video is part of supporting material detailing the "Maximum liquid capacity of hexagon papillae arrays" or "One-way microdroplet transfer". 18179.mp4
Are you trying to find the (the .mp4 file) rather than just the description?