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Ensure your messaging apps (like WhatsApp) and OS are up to date to protect against known MP4-related exploits.
If you are looking for a technical analysis of a file you already possess, you can upload it to a malware scanning service like VirusTotal to check for malicious signatures. WhatsApp Bug Via MP4 File Triggers Snooping Concerns
However, generic warnings about MP4 files are often linked to a high-profile discovered in 2019. In that case, a "specially crafted MP4 file" could trigger a buffer overflow, allowing hackers to execute remote code or snoop on both Android and iOS devices.
