diff --git a/docs/supportedsites.md b/docs/supportedsites.md
index 35c1050e549..49b133b9378 100644
--- a/docs/supportedsites.md
+++ b/docs/supportedsites.md
@@ -483,6 +483,7 @@
  - **Mgoon**
  - **MGTV**: 芒果TV
  - **MiaoPai**
+ - **Mildom**: mildom.com
  - **MinistryGrid**
  - **Minoto**
  - **miomio.tv**
diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 4b3092028f4..d3a8b007101 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -623,6 +623,7 @@
     MicrosoftVirtualAcademyIE,
     MicrosoftVirtualAcademyCourseIE,
 )
+from .mildom import MildomIE
 from .ministrygrid import MinistryGridIE
 from .minoto import MinotoIE
 from .miomio import MioMioIE
diff --git a/youtube_dl/extractor/mildom.py b/youtube_dl/extractor/mildom.py
new file mode 100644
index 00000000000..55e01140dde
--- /dev/null
+++ b/youtube_dl/extractor/mildom.py
@@ -0,0 +1,57 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import re
+
+from .common import InfoExtractor
+from ..compat import compat_str
+from ..utils import try_get
+
+
+class MildomIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?mildom\.com/playback/(?P<channel>[0-9]+)\?v_id=(?P<id>[-0-9]+)'
+    _VIDEO_INFO_BASE_URL = 'https://cloudac.mildom.com/nonolive/videocontent/playback/getPlaybackDetail?v_id=%s'
+    _TEST = {
+        'url': 'https://www.mildom.com/playback/10819667?v_id=10819667-1594032863',
+        'md5': 'bed067a7dff3492184bd06d6131dd8be',
+        'info_dict': {
+            'id': '10819667-1594032863',
+            'ext': 'mp4',
+            'title': '月曜!雀荘ほめちぎり　#1　【麻雀】',
+            'thumbnail': r're:^https?://.*\.png$',
+            'description': '#1 記念すべき初回の出演者は声優の高木美佑さんとVtuber界の麻雀つよつよ先生こと千羽黒乃さん！\nMildom公式番組『麻雀番組』毎週月曜に生放送！\n麻雀アプリも使った視聴者対戦型麻雀バラエティ！',
+            'uploader': '月曜！雀荘ほめちぎり【麻雀】'
+        }
+    }
+
+    def _real_extract(self, url):
+        channel_id, video_id = re.match(self._VALID_URL, url).groups()
+
+        video_data = self._download_json(
+            self._VIDEO_INFO_BASE_URL % video_id, video_id)
+        playback_data = video_data['body']['playback']
+
+        video_url = playback_data['source_url']
+        description = playback_data.get('video_intro')
+        uploader = try_get(playback_data, lambda x: x['author_info']['login_name'], compat_str)
+        title = playback_data.get('title')
+        thumbnail = playback_data.get('video_pic')
+
+        if not title or not thumbnail:
+            webpage = self._download_webpage(url, video_id)
+            if not title:
+                title = self._html_search_meta(
+                    ['og:description', 'description'],
+                    webpage, 'title', default=None)
+            if not thumbnail:
+                thumbnail = self._og_search_thumbnail(webpage, default=None)
+
+        return {
+            'id': video_id,
+            'title': title,
+            'url': video_url,
+            'uploader': uploader,
+            'channel_id': channel_id,
+            'thumbnail': thumbnail,
+            'description': description
+        }