<sequential>
        <video display_name="default" youtube_id_0_75="JMD_ifUUfsU" youtube_id_1_0="OEoXaMPEzfM" youtube_id_1_25="AKqURZnYqpk" youtube_id_1_5="DYpADpL7jAY" name="sample_video"/>
        <video url_name="separate_file_video"/>
        <video url_name="video_with_end_time"/>
        <poll_question name="T1_changemind_poll_foo_2" display_name="Change your answer" reset="false">
        <p>Have you changed your mind?</p>
        <answer id="yes">Yes</answer>
        <answer id="no">No</answer>
    </poll_question>
</sequential>