An electronic device, a server and a method for rendering timed text within an omnidirectional video are disclosed. The method includes receiving a signaling message including a flag indicating whether a position of the timed text within the omnidirectional video is dependent on a viewport of the omnidirectional video. The method also includes determining whether the position of the timed text within the omnidirectional video is dependent on the viewport based on the flag. The method further includes rendering the timed text within the omnidirectional video based on the determination.