chromium/third_party/blink/web_tests/external/wpt/webvtt/rendering/cues-with-video/processing-model/regions/support/scroll_up.vtt

WEBVTT

REGION
id:1
lines:2
scroll:up

00:00:00.000 --> 00:00:05.000 region:1
This is a first test subtitle

00:00:01.000 --> 00:00:05.000 region:1
This is a second test subtitle

00:00:01.000 --> 00:00:05.000 region:1
This is a third test subtitle