Knowing if it was part of a educational course , a media archive , or a social media link would help narrow down its specific origin.
If you have the file and are trying to verify its contents safely: О†ПЂО№ПѓП„ОїП‚ 138 ОІ.mp4
Right-click the file (on Windows) or "Get Info" (on Mac) to see if there is a "Title" or "Author" tag. Knowing if it was part of a educational