diff --git a/yt_dlp/extractor/_extractors.py b/yt_dlp/extractor/_extractors.py
index 5d1dd6038..fc22e1571 100644
--- a/yt_dlp/extractor/_extractors.py
+++ b/yt_dlp/extractor/_extractors.py
@@ -618,6 +618,7 @@ from .filmon import (
 from .filmweb import FilmwebIE
 from .firsttv import FirstTVIE
 from .fivetv import FiveTVIE
+from .flextv import FlexTVIE
 from .flickr import FlickrIE
 from .floatplane import (
     FloatplaneIE,
diff --git a/yt_dlp/extractor/flextv.py b/yt_dlp/extractor/flextv.py
new file mode 100644
index 000000000..f3d3eff85
--- /dev/null
+++ b/yt_dlp/extractor/flextv.py
@@ -0,0 +1,62 @@
+from .common import InfoExtractor
+from ..networking.exceptions import HTTPError
+from ..utils import (
+    ExtractorError,
+    UserNotLive,
+    parse_iso8601,
+    str_or_none,
+    traverse_obj,
+    url_or_none,
+)
+
+
+class FlexTVIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:www\.)?flextv\.co\.kr/channels/(?P<id>\d+)/live'
+    _TESTS = [{
+        'url': 'https://www.flextv.co.kr/channels/231638/live',
+        'info_dict': {
+            'id': '231638',
+            'ext': 'mp4',
+            'title': r're:^214하나만\.\.\. ',
+            'thumbnail': r're:^https?://.+\.jpg',
+            'upload_date': r're:\d{8}',
+            'timestamp': int,
+            'live_status': 'is_live',
+            'channel': 'Hi별',
+            'channel_id': '244396',
+        },
+        'skip': 'The channel is offline',
+    }, {
+        'url': 'https://www.flextv.co.kr/channels/746/live',
+        'only_matching': True,
+    }]
+
+    def _real_extract(self, url):
+        channel_id = self._match_id(url)
+
+        try:
+            stream_data = self._download_json(
+                f'https://api.flextv.co.kr/api/channels/{channel_id}/stream',
+                channel_id, query={'option': 'all'})
+        except ExtractorError as e:
+            if isinstance(e.cause, HTTPError) and e.cause.status == 400:
+                raise UserNotLive(video_id=channel_id)
+            raise
+
+        playlist_url = stream_data['sources'][0]['url']
+        formats, subtitles = self._extract_m3u8_formats_and_subtitles(
+            playlist_url, channel_id, 'mp4')
+
+        return {
+            'id': channel_id,
+            'formats': formats,
+            'subtitles': subtitles,
+            'is_live': True,
+            **traverse_obj(stream_data, {
+                'title': ('stream', 'title', {str}),
+                'timestamp': ('stream', 'createdAt', {parse_iso8601}),
+                'thumbnail': ('thumbUrl', {url_or_none}),
+                'channel': ('owner', 'name', {str}),
+                'channel_id': ('owner', 'id', {str_or_none}),
+            }),
+        }