title: Flutter Dart: RegEx to extract URLs from a String
body: <p>This is my string:</p>
  
  <pre><code>    window.urlVideo = 'https://node34.vidstreamcdn.com/hls/5d59908aea5aa101a054dec2a1cd3aff/5d59908aea5aa101a054dec2a1cd3aff.playlist.m3u8';
  var playerInstance = jwplayer("myVideo");
  var countplayer = 1;
  var countcheck = 0;
  playerInstance.setup({
      sources: [{
          "file": urlVideo
      }],
      tracks: [{
          file: "https://cache.cdnfile.info/images/13f9ddcaf2d83d846056ec44b0f1366d/12.vtt",
          kind: "thumbnails"
      }],
      image: "https://cache.cdnfile.info/images/13f9ddcaf2d83d846056ec44b0f1366d/12_cover.jpg",
  });
  
  function changeLink() {
      window.location = "//vidstreaming.io/load.php?id=MTM0OTgz&amp;title=Mairimashita%21+Iruma-kun+Episode+12";
  }
  window.shouldChangeLink = function () {
      window.location = "//vidstreaming.io/load.php?id=MTM0OTgz&amp;title=Mairimashita%21+Iruma-kun+Episode+12";
  }
  </code></pre>
  
  <p>I am using flutter dart.</p>
  
  <p>How can I get window.urlVideo URL link and image URL link and .vtt file link? </p>
  
  <p>Or</p>
  
  <p>How can I get a list of URLs from a String?
  I tried finding a way with and without using RegEx but I couldn't.</p>
  
  <p>Any help is apreciated</p>