6181147.mp4.mp4

The number appears in several unrelated contexts that might be linked to why this specific string was used: Potential Origins of the ID Media Article ID : A Daily Mail article

: Occasionally, malicious files use double extensions (like .mp4.exe ) to trick users into clicking them, though .mp4.mp4 is more likely a simple technical error. 6181147.mp4.mp4

from 2018 regarding the BBC drama Wanderlust uses this exact number in its URL. It is possible a video clip from this episode was saved with the article's ID as the filename. The number appears in several unrelated contexts that

: In specialty toy catalogs, 6181147 is the product code for a Safari Contour Puzzle Go to product viewer dialog for this item. 6181147.mp4.mp4