How to get custom vtt subtitle or caption file to show up in the transcript window and be searchable

Ok... I finally figured out what was going on after lots of trial/error and closer looking at the problematic VTT files. 

It turns out Stream will not parse the VTT file uploaded in the caption section and turn it into the transcript if there is a line in the file that has no elapsed duration/gap between the time codes.  For example like this:

00:16:24.490 --> 00:16:24.490
keep falling apart.

If you change the time codes so there is a time gap between them, it works fine. Like this:

00:16:24.490 --> 00:16:24.491
keep falling apart.

So for the example VTT file you sent, there is actually 2 lines in the file where there is no gap in the time codes. I updated these 4 lines in your file to ensure there is gap and the subsequent line also starts at the new time. Once I did that your custom VTT file works correctly and shows up as the transcript. (See the attached file below that is the fixed VTT, to try yourself.)

00:16:24.490 --> 00:16:24.491
keep falling apart.

00:16:24.491 --> 00:16:26.890
THE WITNESS:  417?


00:41:07.740 --> 00:41:07.741
read it.

00:41:07.741 --> 00:41:21.720
(Requested portion of record read.)

I'll file a bug on our side in Stream to fix this issue so that our parsing logic still works even if there are lines in the VTT with the beginning/ending time codes the same. I don't know how easy/hard this will be to fix on our side.