diff --git a/test/helper.py b/test/helper.py
index b63a5c897..598f803f4 100644
--- a/test/helper.py
+++ b/test/helper.py
@@ -211,7 +211,7 @@ def sanitize_got_info_dict(got_dict):
 
         # Auto-generated
         'autonumber', 'playlist', 'format_index', 'video_ext', 'audio_ext', 'duration_string', 'epoch',
-        'fulltitle', 'extractor', 'extractor_key', 'filepath', 'infojson_filename', 'original_url',
+        'fulltitle', 'extractor', 'extractor_key', 'filepath', 'infojson_filename', 'original_url', 'n_entries',
 
         # Only live_status needs to be checked
         'is_live', 'was_live',
diff --git a/yt_dlp/extractor/extractors.py b/yt_dlp/extractor/extractors.py
index 1b32efc47..77d6ef511 100644
--- a/yt_dlp/extractor/extractors.py
+++ b/yt_dlp/extractor/extractors.py
@@ -656,6 +656,7 @@ from .kankan import KankanIE
 from .karaoketv import KaraoketvIE
 from .karrierevideos import KarriereVideosIE
 from .keezmovies import KeezMoviesIE
+from .kelbyone import KelbyOneIE
 from .ketnet import KetnetIE
 from .khanacademy import (
     KhanAcademyIE,
diff --git a/yt_dlp/extractor/kelbyone.py b/yt_dlp/extractor/kelbyone.py
new file mode 100644
index 000000000..20c26cf48
--- /dev/null
+++ b/yt_dlp/extractor/kelbyone.py
@@ -0,0 +1,84 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import int_or_none
+
+
+class KelbyOneIE(InfoExtractor):
+    _VALID_URL = r'https?://members\.kelbyone\.com/course/(?P<id>[^$&?#/]+)'
+
+    _TESTS = [{
+        'url': 'https://members.kelbyone.com/course/glyn-dewis-mastering-selections/',
+        'playlist_mincount': 1,
+        'info_dict': {
+            'id': 'glyn-dewis-mastering-selections',
+            'title': 'Trailer - Mastering Selections in Photoshop',
+        },
+        'playlist': [{
+            'info_dict': {
+                'id': 'MkiOnLqK',
+                'ext': 'mp4',
+                'title': 'Trailer - Mastering Selections in Photoshop',
+                'description': 'md5:d41d8cd98f00b204e9800998ecf8427e',
+                'thumbnail': 'https://content.jwplatform.com/v2/media/MkiOnLqK/poster.jpg?width=720',
+                'timestamp': 1601568639,
+                'duration': 90,
+                'upload_date': '20201001',
+            },
+        }]
+    }]
+
+    def _entries(self, playlist):
+        for item in playlist:
+            video_id = item['mediaid']
+            thumbnails = [{
+                'url': image.get('src'),
+                'width': int_or_none(image.get('width')),
+            } for image in item.get('images') or []]
+            formats, subtitles = [], {}
+            for source in item.get('sources') or []:
+                if not source.get('file'):
+                    continue
+                if source.get('type') == 'application/vnd.apple.mpegurl':
+                    fmts, subs = self._extract_m3u8_formats_and_subtitles(source['file'], video_id)
+                    formats.extend(fmts)
+                    subtitles = self._merge_subtitles(subs, subtitles)
+                elif source.get('type') == 'audio/mp4':
+                    formats.append({
+                        'format_id': source.get('label'),
+                        'url': source['file'],
+                        'vcodec': 'none',
+                    })
+                else:
+                    formats.append({
+                        'format_id': source.get('label'),
+                        'height': source.get('height'),
+                        'width': source.get('width'),
+                        'url': source['file'],
+                    })
+            for track in item.get('tracks'):
+                if track.get('kind') == 'captions' and track.get('file'):
+                    subtitles.setdefault('en', []).append({
+                        'url': track['file'],
+                    })
+            self._sort_formats(formats)
+            yield {
+                'id': video_id,
+                'title': item['title'],
+                'description': item.get('description'),
+                'thumbnails': thumbnails,
+                'thumbnail': item.get('image'),
+                'timestamp': item.get('pubdate'),
+                'duration': item.get('duration'),
+                'formats': formats,
+                'subtitles': subtitles,
+            }
+
+    def _real_extract(self, url):
+        item_id = self._match_id(url)
+        webpage = self._download_webpage(url, item_id)
+        playlist_url = self._html_search_regex(r'playlist"\:"(https.*content\.jwplatform\.com.*json)"', webpage, 'playlist url').replace('\\', '')
+        course_data = self._download_json(playlist_url, item_id)
+        return self.playlist_result(self._entries(course_data['playlist']), item_id,
+                                    course_data.get('title'), course_data.get('description'))