chromium/third_party/blink/web_tests/external/wpt/webvtt/rendering/cues-with-video/processing-model/support/underline_with_2_timestamps.vtt

WEBVTT

00:00:00.000 --> 00:00:10.000
<00:00.000><u>This is a </u><00:05.000><u>test subtitle</u>