chromium/third_party/blink/web_tests/media/track/captions-webvtt/captions-regions.vtt

WEBVTT FILE

REGION
id:fred
width:50%
lines:2
regionanchor:50%,100%
viewportanchor:10%,40%

1
00:00:00.000 --> 00:00:01.500 region:fred
We are in New York City

2
00:00:00.500 --> 00:00:01.500 region:fred
Second cue

3
00:00:01.000 --> 00:00:02.500 region:fred
Multiline
Cue

4
00:00:02.000 --> 00:00:03.000 region:fred
Fourth cue!