Video player with Metadata track (type = selector)
Time-synced metadata is provided in a WebVTT file with kind="metadata".
A data-meta-type
attribute has value "selector",
which is one of two types of supported metadata tracks
(the other is "text"). With "selector" as the metadata type,
the contents of the WebVTT file is used to identify
blocks of existing hidden content that are shown at the designated times during playback.
The keyword PAUSE
on a single line within the WebVTT file causes the player to pause
at the designated times.
There are metadata events embedded in this demo at 0:23 and 0:39 seconds.