How it works

Step 1
Create an ionic angular app or use an existing one. We will create a new one using the "tabs" template.

ionic start myApp tabs

Step 2
Install the following dependencies

ionic cordova plugin add cordova-plugin-advanced-http
ionic cordova plugin add cordova-plugin-streaming-media

npm install ionic-youtube-streams --save
npm install @ionic-native/streaming-media --save

https://www.npmjs.com/package/ionic-youtube-streams

Step 3
Open the app in your IDE

Step 4
Import the "ionic-youtube-streams" dependency in your *.page.ts

import * as yt from 'ionic-youtube-streams';
import {StreamingMedia, StreamingVideoOptions} from '@ionic-native/streaming-media/ngx';

Step 5
Create a method for fetching the youtube stream based on a video id. Then create a second method for playing the stream.

constructor(private readonly streamingMedia: StreamingMedia) {}

async streamVideo() {
    const info: any = await yt.info('XJNlK8n_rTU');
    this.streamURL(info.formats[0].url);
}

private streamURL(url: any) {
    const options: StreamingVideoOptions = {
      successCallback: () => {
      },
      errorCallback: (e) => {
        console.log('Error streaming');
      },
      orientation: 'portrait',
      shouldAutoClose: true,
      controls: true
    };

    this.streamingMedia.playVideo(url, options);
}

Step 6
Add the StreamingMedia Provider to your app.module.ts

import {StreamingMedia} from "@ionic-native/streaming-media/ngx";

providers: [
    ...
    StreamingMedia,
  ],

Step 7
Create a UI element e.g. a button, which will start playing the video stream

  <ion-button expand="block" (click)="streamVideo()">Stream Video</ion-button>

Step 8
Start the app in your emulator and test

ionic cordova emulate ios -l -c --target "YOUR SIMULATOR ID" -- --buildFlag="-UseModernBuildSystem=0"