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<!DOCTYPE html>
<body>
<script>
'use strict';
function remoteize(relpath) {
let curdir = location.href.replace(/\/[^\/]*$/, '/')
return curdir.replace('://', '://www1.') + relpath
}
function create_media_promise() {
return new Promise((resolve, reject) => {
let video = document.createElement('video')
video.autoplay = true
video.muted = true
video.onplay = () => resolve('ok')
video.onerror = () => reject('video error')
video.src = remoteize('fetch_video.py')
})
}
</script>
</body>