How to play in-between sequence in Timeline

I have added sequence of camera, animation, sounds, etc in timeline.
As normal play the sequence will be played in order from first.
But I need to play in-between sequence if needed, like from 25 sec/frame.
Is there any scripts to choose sequence in-between, so that the user can select from which stage to play instead playing from first.

 

Wrong forum, post here: https://forum.unity.com/forums/timeline.127/

 

Thanks a lot for the help