A REC file contains video created by a Topfield PVR digital video recorder, a device used to record standard and high definition television programming. It is saved in a proprietary compressed format that can be viewed on a Topfield PVR device or with various third-party video players.
You will most likely only encounter a REC file if you own a Topfield PVR digital video recorder and have recorded TV programming. You may also receive a REC video file from someone who owns a Topfield PVR digital video recorder.
REC files can be opened with various video players, including Squared 5 MPEG Streamclip and VideoLAN VLC media player. The VLC media player software can also be used to convert REC files to more widely supported video formats.
NOTE: REC files are also known as Toppy files, since Toppy is short for Topfield.