A VTT file, short for Video Text Tracks, is a text-based file format used to display timed text tracks (such as subtitles or captions) in HTML5 video players. It's a plain text file that contains cues, which are blocks of text associated with specific start and end times. These cues are displayed on the video screen during playback, making the video accessible to a wider audience, including those who are deaf or hard of hearing, or those who prefer to read along with the dialogue. VTT files support various features, including styling options like font color, size, and position, allowing for customization of the displayed text. They are crucial for providing accessibility and enhancing the viewing experience for users across different platforms and devices. The format is designed to be relatively simple and easy to parse, making it a widely supported standard for web-based video players. The file typically contains a WEBVTT header, followed by the cues, each consisting of a cue identifier (optional), a time range, and the text to be displayed.