Before you begin, make sure your development environment includes Node.js and npm.

npm install @pdftron/webviewer-video
npm install @pdftron/webviewer-audio

Here is an example of how WebViewer, Webviewer-video and WebViewer-audio could be integrated into your application.

import React, { useRef, useEffect } from 'react';
import WebViewer from '@pdftron/webviewer';
import { initializeVideoViewer } from '@pdftron/webviewer-video';
import {
  Waveform,
  initializeAudioViewer
} from '@pdftron/webviewer-audio';

const App = () => {
    const viewer = useRef(null);
    const videoUrl = 'https://pdftron.s3.amazonaws.com/downloads/pl/video/video.mp4';

    useEffect(() => {
      WebViewer(
        {
          path: '/webviewer/lib',
        },
        viewer.current,
      ).then(async instance => {
        await initializeAudioViewer(
          instance,
          { license },
        );

        // Extends WebViewer to allow loading media files (.mp3, .mp4, ogg, webm, etc.)
        const {
            loadVideo,
        } = await initializeVideoViewer(
            instance,
            {
                license: '---- Insert commercial license key here after purchase ----',
                AudioComponent: Waveform,
                cacheAudioWaveform: false,
            }
        );

        // Load a video at a specific url. Can be a local or public link
        // If local it needs to be relative to lib/ui/index.html.
        // Or at the root. (eg '/video.mp4')
        // A unique fileId should be generated for each url for audio caching to work properly
        loadVideo(videoUrl, { fileId: 'testId' });
      });
    }, []);

    return (
        <div className="App">
            <div className="webviewer" ref={viewer} />
        </div>
    );
}

export default App;

Also see the React sample, for a complete solution, with further customizations.