Which of the following is a key feature of FTK?

The key feature of FTK, or Forensic Toolkit, is its capability for image creation and analysis of digital evidence. This aspect is central to digital forensics, as it allows examiners to create a complete forensic image of a drive or storage medium, which can be used for in-depth analysis without altering the original data. FTK excels in processing and analyzing this data efficiently, providing tools for recovering deleted files, analyzing file structures, and understanding user activity through various artifacts present within the image.

By being able to work with a comprehensive forensic image, investigators can ensure the integrity of the evidence while thoroughly examining it for potential leads or information relevant to their cases. This feature supports both forensic analysis and legal proceedings, where the preservation of data integrity is critical.

The other choices do not directly align with FTK's most critical capabilities. Compliance with video file formats may be relevant to certain investigations but does not define FTK’s core functionality. Limiting the analysis to virtual machines or focusing on software compatibility are more niche areas and do not encompass the broader features that make FTK an essential tool in forensic examinations.