If it is a legitimate video asset, you can sometimes find the original creator by checking the file properties or using a reverse image search on a still frame.
Generic, provocative file names (e.g., "Sexy Girl") followed by ID numbers are commonly used as "clickbait" in spam emails or on untrusted file-sharing sites to trick users into downloading malicious software.
If it came from an unknown sender or an untrusted website, avoid opening it.