Timed text is a text that is synchronized with another source, typically as subtitle of a video. Is there a related \LaTeX package? Can PDFLaTeX output be made to "scroll up" according to certain time-stamps in the source file. That is, can we insert certain time-stamps in a \LaTeX code so that the output PDF shows up in a rectangle, with a highlight for the current segment in the middle of rectangle, and PDF scrolls up in real time according to some time-tags.
This post, on simulating terminal output, comes close.