Insert video into HTML

I wanted to embed a video in HTML. I tried to do it with player script. I registered the paths and scripts, but the video is not visible on the page, although it can be found and clicking the video will open in an additional window. What's wrong?

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-html -->

<main>
  <div class="wrapper">
    <section class="intro">
      <div class="intro-wrap text-intro-wrap">
        <h1 class="title">ПОБЕждай с нами</h1>
        <p class="under-title-text">Присоединяйся к команде ПОБЕДителей.</p>
        <a href="https://xn--80aaadiigoj9aqmm.xn--p1ai/%D0%B2%D0%B0%D0%BA%D0%B0%D0%BD%D1%81%D0%B8%D0%B8/?occupation=%D0%9E%D1%84%D0%B8%D1%81" class="standard-button red-button">Хочу в команду ПОБЕДителей!</a>
      </div>
      <div class="intro-wrap">
        <a href="video/video.mp4" style="display: block; width: 300px; height: 200px;" id="player"></a>
        <script type="text/javascript">
          flowplayer("player", "flowplay/flowplayer.swf");
        </script>
      </div>
    </section>
  </div>

<!-- end snippet -->

Did according to the instructions found.

You should be using the video tag in HTML5.

<video width="400" controls>
  <source src="video/video.mp4" type="video/mp4">
</video>

I will work fine