It is almost certainly a video file using the MP4 (MPEG-4 Part 14) container . This format commonly stores video, audio, and metadata tags like title, artist, or creation date.
Many digital video recorders (DVRs) name files with long numeric strings (timestamps or IDs) followed by ".mp4." 26770mp4
The number "26770" is very similar to part numbers for high-performance storage, such as the WD_BLACK SN770 series. If this text appeared in a system log, it might relate to a media file stored on or processed by such a device. It is almost certainly a video file using
File types supported by Windows Media Player - Microsoft Support and metadata tags like title