The string of characters directly preceding _source.mp4 often points to the database of the platform it was downloaded from. Look closely at the website where you found the link or file.
Could you provide on where you found this file name or describe what is actually shown in the video? 0h7zvxp2refbv9wwyx1dl_source.mp4
Offer your best researched theories on what the video is showing and cite any similar web mysteries or known platform glitches for context. The string of characters directly preceding _source