Briz Video Joiner is a useful, powerful and easy-to-use tool to join multiple video files Briz Video Joiner is a useful, powerful and easy-to-use tool to join multiple video files (MPEG , AVI, WMV, RM) into one larger video file. MPEG and AVI files with identical parameters (such as frame size, frame rate) can be joined without recompression quickly and without quality loss.