I've encountered an issue with the scripts/download_ffmpeg.bat file. When running Kaspersky antivirus, this file is flagged as a potential Trojan malware.
File name: scripts/download_ffmpeg.bat
Antivirus: Kaspersky
Similar Issue Reference: Related Issue, where a plugin (share/frei0r/medians.dll) triggered similar detections by Kaspersky and ZoneAlarm.
I've attached a screenshot showing the alert from Kaspersky for reference.

Proposed Update: Updating the download_ffmpeg.bat file to the latest codex/ffmpeg release may address the issue. I can submit a pull request with this update if that would be useful.