Add ability to display starting segment from the bootstrap for the live stream

[xwin]

I found that for some live streams the content provider allows to replay stream from the beginning - i.e. stream was playing for 30 minutes but there is a progress bar that can be used to play stream from time 0. In such cases I can use network web developer tool from Firefox to sniff out the starting segment.
Would it be possible to display starting segment for such streams? May be a switch or a display after Selected: line?