If you know where the video was downloaded from, the context of the website can explain its purpose.
If you can provide the context of where you found this file, I can offer more tailored information. To give you a more helpful answer, could you tell me: did you download or find this file? What is shown in the video, if you've opened it? 5fafd07f3a99a878650ad_source.mp4
Without seeing the content of the file 5fafd07f3a99a878650ad_source.mp4 , it is difficult to provide a specific "useful piece." If you know where the video was downloaded
If you can generate a file hash (like MD5 or SHA256) of 5fafd07f3a99a878650ad_source.mp4 , you can search that hash online to see if others have identified the same video. 5fafd07f3a99a878650ad_source.mp4