WTV is a video file format used by Windows Media Center to store recorded TV shows. WTV files can contain video, audio, and metadata such as show information and timestamps. WTV files are commonly used for recording and playing back TV content on Windows-based systems.
AVI is a video format developed by Microsoft that stores both video and audio data in a single file container. It supports multiple codecs and is known for delivering high-quality output, though files can be large. AVI is compatible with most media players and remains a reliable format for local video playback.