Key Frame: In video compression, a key frame is a crucial component where a complete image is stored in the data stream. Unlike other frames that may only store changes from previous frames, a key frame contains all the necessary data to display a full image independently. This allows for efficient video playback and editing, as key frames serve as reference points that enable the reconstruction of subsequent frames. By periodically inserting key frames into the video stream, compression algorithms can maintain high video quality while reducing the overall file size. Key frames are essential for tasks such as seeking, where the video player can quickly jump to a specific point in the video by locating the nearest key frame and decoding from there.