Try opening it with VLC Media Player , which supports almost every video format and codec variant.
If "Young[35]" is an error code or a specific log entry in a program: Young[35] mp4
Be cautious if you found this file on a peer-to-peer (P2P) network or an unverified site. Try opening it with VLC Media Player ,
Run the file through a scanner like VirusTotal before opening, as oddly named media files are sometimes used to disguise scripts. 4. Technical Troubleshooting Young[35] mp4
Sometimes software fails to read files if the path contains brackets like [35] . Try renaming the file to young35.mp4 to see if that resolves the issue.