<header><!-- 头部 --> <nav> <article> <section> <aside> <footer>
<video width="320" height="240" autoplay="autoplay" muted="muted" controls>
<source src="" type="video/mp4">
</video>
<header><!-- 头部 --> <nav> <article> <section> <aside> <footer>
<video width="320" height="240" autoplay="autoplay" muted="muted" controls>
<source src="" type="video/mp4">
</video>