Clicking links for these types of files often triggers aggressive pop-ups and tracking cookies. Recommendation
These files are often used for pirated movies, adult content, or leaked videos. Without a source link, it is impossible to verify the quality (resolution, audio) or the actual content.
Randomly named .mp4 files from unverified download links are frequently used to distribute malware or adware . If the site asks you to download an .exe or a "download manager" to view the video, it is likely a virus.