One of the longer segments (like 3705495998099333709 ) is likely the unique identifier for that specific video post in Meta's database.
This confirms the file is a digital multimedia container format, the standard for web-based video due to its high compatibility and compression. How to Download Such Files Download 10000000 934768483855199 3705495998099333709 mp4
If you are trying to download a video that has been assigned this type of name, you are likely using one of the following methods: One of the longer segments (like 3705495998099333709 )
Right-clicking a video and selecting "Save Video As..." often results in these long numerical filenames. Download 10000000 934768483855199 3705495998099333709 mp4