Allow display of startTime/endTime as relative or absolute

[patcon]

Depending on how someone is skimming the transcript, it can be more useful for speech elements to have either the clock time or the relative timecode in a recording.

Could we add a display format selector for choosing absolute or relative?

This would seem to require:

• Allowing something like an optional recordingStartTime attribute to each debateSection element.
• If a debateSection has this attribute, then show a dropdown on the end-user view page, allowing preference for absolute clocktime vs relative timecode
• For debateSections with recordingStartTime, use preferred selection, falling back to absolute if a section has no recordingStartTime. (Perhaps add a little tooltip question mark on fallback to explain to end-user?)

For this to work: Is there a section-level AN attribute in the spec that corresponds to the absolute time that the event (ie. debateSection) started?* If not, could we supplement this?

Possible caveats:

• If the recording is not real-time (but instead has cuts), and the adminstrator doesn't understand the above behaviour, then the display of a timecode might be misleading. It would look like a video timecode, but it wouldn't align with any recording timecodes after the first cut.

Thoughts on whether this is a worthwhile train of discussion? As it stands, our workaround will be to try to put a timestamp in the corner of our livestreams, so they can be matched with SayIt transcripts. But for existing videos or third-party videos where we can't realistically get them to add timestamp watermarking, all users will have is the YouTube timecode.

* ^{(I'll admit that I feel like I don't understand how they've documented the spec, because I don't even see startTime/endTime in the spec I can find...!)}