Playing m2t video file seek problem (not stream)

[Chani2024]

While playing m2t file, I can see the buffered segment of the video, that moves along as the play progresses, but if I try to seek to any point outside of this buffer, the video gets stuck & is not playable anymore. The m2t file is stored on the local server, it is not a stream.
The segment is:
videoElement.buffered.end(0) - videoElement.buffered.start(0)