1.npm install --save flv.js
2.import flvjs from 'flv.js'

<video
        id="videoElement"
        class="centeredVideo"
        style="height: 100%; width: 100%; background-color: black;">
Your browser is too old which doesn't support HTML5 video.</video>

js:

if (flvjs.isSupported()) {
        var videoElement = document.getElementById('videoElement')
        console.log(videoElement)
        var flvPlayer = flvjs.createPlayer({
          type: 'flv',
          url: 'flv地址'
        })
        flvPlayer.attachMediaElement(videoElement)
        flvPlayer.load()
        flvPlayer.play()
      }