[webvmt] Status Update

1. Progress Made
     i. Continued development of prototype polyfill for WICG DataCue API [1] to support synchronisation of video with timed metadata in web browsers.
     ii. Reported issues relating to time update event [2] and media duration [3] in WebKit bug repo:
        * Playing video in Safari can generate non-monotonic 'timeupdate’ events [4]
        * Clicking on Safari video timeline UI does not always seek to time requested [5]
        * Replaying video in Safari can seek to random non-zero time followed by 'timeupdate' at zero [6]
        * Safari can calculate incorrect video duration [7]
    iii. Presented two demos showing how maritime vessel tracking accuracy and aerial surveillance cognition use cases can be improved with WebVMT in GIMI session of OGC Testbed-20 Demo Day [8] on 24 February 2025.
    iv. Raised issue in WICG DataCue repo to propose exposing HTML TextTrackCue constructor [9] that enables custom cues for timed metadata in Javascript, including WICG DataCue API [1].
    v. Continued participation in OGC Testbed-20 GIMI [10] to ensure that proposed design for GIMI video timed metadata is aligned with existing formats.

2. Next Steps
    i. Write explainer for proposed change to expose HTML TextTrackCue constructor [9] that enables custom cues for timed metadata in Javascript, including WICG DataCue API [1].
    ii. Continue participation in OGC Testbed-20 GIMI [10] to ensure that proposed design for GIMI video timed metadata is aligned with existing formats.
    iii. Continue alignment discussions with OGC GeoPose SWG [11].
    iv. Continue community outreach and identify more activities to promote progress towards the standardisation track.

[1] https://wicg.github.io/datacue/#datacue-interface
[2] https://html.spec.whatwg.org/multipage/media.html#event-media-timeupdate
[3] https://html.spec.whatwg.org/multipage/media.html#dom-media-duration
[4] https://bugs.webkit.org/show_bug.cgi?id=287430
[5] https://bugs.webkit.org/show_bug.cgi?id=287433
[6] https://bugs.webkit.org/show_bug.cgi?id=287434
[7] https://bugs.webkit.org/show_bug.cgi?id=287435
[8] https://www.ogc.org/event/t20-demo-days/
[9] https://github.com/WICG/datacue/issues/35
[10] https://portal.ogc.org/files/108074#GIMI
[11] https://www.ogc.org/projects/groups/geoposeswg