c="blue.png?id=input"></input>
        <object type="image/png" data="blue.png?id=object"></object>
        <video poster="blue.png?id=video-poster"></video>
        <video src="/media/test.mp4?id=video-src" autoplay="true"></video>
        <video autoplay="true">
            <source src="/media/test.mp4?id=video-source" type="video/mp4">
            <source src="/media/test.ogv?id=video-source" type="video/ogg">
            <track kind="subtitles" src="empty.py?id=video-track" srclang="en" default>
       