MOV is one of the most common multimedia file formats. It was developed by Apple Computer, compatible with Macintosh and Windows platforms. It was first used actively in the early 1990s after Apple launched its QuickTime Media Player, so it’s sometimes called QuickTime. At first, it was a unique format for audio and video data, but later its competitors such as AVI, AMV, FLV, Real Media appeared. MOV files are currently standard for storing movies and any other video.
ASF is a media file format developed by Microsoft. This format is preferred for Windows Media. This player can play not only video or audio files, but also mixed recordings that are compressed using certain codecs and saved in an ASF file. Files of this format also additionally store metadata (including title, author, copyright information). The full original name of the format is Advanced Systems Format. The main goal of Microsoft in developing this format was to provide streaming media playback.