diff --git a/yt_dlp/extractor/extractors.py b/yt_dlp/extractor/extractors.py
index 7be6eec1f7..4b15598863 100644
--- a/yt_dlp/extractor/extractors.py
+++ b/yt_dlp/extractor/extractors.py
@@ -1428,6 +1428,7 @@ from .theplatform import (
 from .thescene import TheSceneIE
 from .thestar import TheStarIE
 from .thesun import TheSunIE
+from .theta import ThetaIE
 from .theweatherchannel import TheWeatherChannelIE
 from .thisamericanlife import ThisAmericanLifeIE
 from .thisav import ThisAVIE
diff --git a/yt_dlp/extractor/theta.py b/yt_dlp/extractor/theta.py
new file mode 100644
index 0000000000..34c0da8156
--- /dev/null
+++ b/yt_dlp/extractor/theta.py
@@ -0,0 +1,51 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import try_get
+
+
+class ThetaIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?theta\.tv/(?P<id>[a-z0-9]+)'
+    _TESTS = [{
+        'url': 'https://www.theta.tv/davirus',
+        'skip': 'The live may have ended',
+        'info_dict': {
+            'id': 'DaVirus',
+            'ext': 'mp4',
+            'title': 'I choose you - My Community is King -👀 - YO HABLO ESPANOL - CODE DAVIRUS',
+            'thumbnail': r're:https://live-thumbnails-prod-theta-tv\.imgix\.net/thumbnail/.+\.jpg',
+        }
+    }, {
+        'url': 'https://www.theta.tv/mst3k',
+        'note': 'This channel is live 24/7',
+        'info_dict': {
+            'id': 'MST3K',
+            'ext': 'mp4',
+            'title': 'Mystery Science Theatre 3000 24/7 Powered by the THETA Network.',
+            'thumbnail': r're:https://user-prod-theta-tv\.imgix\.net/.+\.jpg',
+        }
+    }]
+
+    def _real_extract(self, url):
+        channel_id = self._match_id(url)
+        info = self._download_json(f'https://api.theta.tv/v1/channel?alias={channel_id}', channel_id)['body']
+
+        m3u8_playlist = next(
+            data['url'] for data in info['live_stream']['video_urls']
+            if data.get('type') != 'embed' and data.get('resolution') in ('master', 'source'))
+
+        formats = self._extract_m3u8_formats(m3u8_playlist, channel_id, 'mp4', m3u8_id='hls', live=True)
+        self._sort_formats(formats)
+
+        channel = try_get(info, lambda x: x['user']['username'])  # using this field instead of channel_id due to capitalization
+
+        return {
+            'id': channel,
+            'title': try_get(info, lambda x: x['live_stream']['title']),
+            'channel': channel,
+            'view_count': try_get(info, lambda x: x['live_stream']['view_count']),
+            'is_live': True,
+            'formats': formats,
+            'thumbnail': try_get(info, lambda x: x['live_stream']['thumbnail_url']),
+        }