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Test Info:

<!DOCTYPE html>
<title>Performance Paint Timing Test: FCP due to loaded video frame</title>
<script src="../resources/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/media.js"></script>
<video id="video" autoplay></video>
setup({"hide_test_state": true});
promise_test(async t => {
assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
await new Promise(r => window.addEventListener('load', r));
await assertNoFirstContentfulPaint(t);
// Set actual video content to trigger FCP.
const video = document.getElementById('video');
video.src = getVideoURI('/media/test');
await new Promise(resolve => {
video.oncanplay = resolve;
await assertFirstContentfulPaint(t);
}, 'Video should become contentful when first frame is loaded');