Server response headers required for mp4 format
Content-range header needed for the player to implement FF and REW functions correctly
This issue refers to VOD playback using mp4 or mov format.
To provide all VOD functionalities, the video server needs to provide the Content-Range information in response header. If this information is omitted, the FF and REW functions will not work properly.
This happens because FFMpeg HTTP server needs the Content-Range response header to perform the seek function, in other case it returns an error.
You can find more information about Content-Range header in the W3 protocol documentation. .