title: json.dumps returned ffid, not the real value
body: <p>I'm trying to convert a dict to json using json.dumps() but the result was:<br>
  <code>{&quot;ok&quot;: true, &quot;download&quot;: [{&quot;ffid&quot;: 12}, {&quot;ffid&quot;: 13}, {&quot;ffid&quot;: 14}]}</code><br>
  But before it was dumped:</p>
  <pre><code>{'ok': True, 'download': [{
    width: '480',
    height: '852',
    dimension: '480x852',
    url: 'https://video.twimg.com/ext_tw_video/153160646996504583/pu/vid/480x852/5sr-JDgzHuzrg7qw.mp4?tag=12'
  }, {
    width: '720',
    height: '1280',
    dimension: '720x1280',
    url: 'https://video.twimg.com/ext_tw_video/153163064996504583/pu/vid/720x1280/p4o_yhEiZ0.mp4?tag=12'
  }, {
    width: '320',
    height: '568',
    dimension: '320x568',
    url: 'https://video.twimg.com/ext_tw_video/153163046996504583/pu/vid/320x568/0eBBwDHUpv9.mp4?tag=12'
  }]}
  </code></pre>
  <p>My code:</p>
  <pre><code>import json
  from javascript import require
  twitterGetUrl = require('twitter-url-direct')
  link = twitterGetUrl('https://twitter.com/Porsche/status/1469439221920370690?t=6l5RFIahtPkxhHJkNDhfbg&amp;s=19', timeout=600)
  linksx = []
  for links in link['download']:
      if links['dimension']:
          linksx.append(links)
  medias = {
      'ok': True,
      'type': 'video',
      'download': linksx
  }
  print(json.dumps(medias))
  </code></pre>
  <p>Q: Is there a way to fix the result after it was dumped as json?</p>