If you are unsure of the file's origin, follow these steps to "review" it safely:
: Before opening, upload the file to a site like VirusTotal to ensure it does not contain malicious scripts disguised as a video. Download File pvztftte.mp4
Knowing the source would allow me to give you a specific review of the actual video content. How to Convert Any Video to MP4 format If you are unsure of the file's origin,