Do not open it. Instead, upload it to a scanning service like VirusTotal to check for hidden threats.
To provide a more detailed report, could you clarify where you encountered this file? It is likely a Saweetie Music Video. Crazy Sweetie mp4
ULTIMATE Baby Funny Moments: 1 Hour of Cutest Baby Video - YouTube. This content isn't available. YouTube·5-minute Fails Do not open it
There are many "Ultimate Funny Moments" videos that feature clips of babies or pets described as "Sweetie" or "Crazy". Do not open it. Instead