Some creators use ".mp4" in their branding, such as the account together.mp4 found in social media listings.
The term "girls" combined with numerical markers is common in visual novel games or character-based apps. For instance, Action Taimanin features "beautiful graphics and epic stories" involving various female characters. Hot Girls (238) mp4
If you are looking for a specific narrative, providing more details about the plot or where you saw the file name would be helpful. Action Taimanin - Apps on Google Play Some creators use "