diff --git a/yt_dlp/extractor/extractors.py b/yt_dlp/extractor/extractors.py
index 572c327515..e280c71ce0 100644
--- a/yt_dlp/extractor/extractors.py
+++ b/yt_dlp/extractor/extractors.py
@@ -1315,6 +1315,7 @@ from .simplecast import (
 )
 from .sina import SinaIE
 from .sixplay import SixPlayIE
+from .skeb import SkebIE
 from .skyit import (
     SkyItPlayerIE,
     SkyItVideoIE,
diff --git a/yt_dlp/extractor/skeb.py b/yt_dlp/extractor/skeb.py
new file mode 100644
index 0000000000..81aecb3112
--- /dev/null
+++ b/yt_dlp/extractor/skeb.py
@@ -0,0 +1,143 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..utils import ExtractorError, determine_ext, parse_qs, traverse_obj
+
+
+class SkebIE(InfoExtractor):
+    _VALID_URL = r'https?://skeb\.jp/@[^/]+/works/(?P<id>\d+)'
+
+    _TESTS = [{
+        'url': 'https://skeb.jp/@riiru_wm/works/10',
+        'info_dict': {
+            'id': '466853',
+            'title': '内容はおまかせします！ by 姫ノ森りぃる@一周年',
+            'descripion': 'md5:1ec50901efc3437cfbfe3790468d532d',
+            'uploader': '姫ノ森りぃる@一周年',
+            'uploader_id': 'riiru_wm',
+            'age_limit': 0,
+            'tags': [],
+            'url': r're:https://skeb.+',
+            'thumbnail': r're:https://skeb.+',
+            'subtitles': {
+                'jpn': [{
+                    'url': r're:https://skeb.+',
+                    'ext': 'vtt'
+                }]
+            },
+            'width': 720,
+            'height': 405,
+            'duration': 313,
+            'fps': 30,
+            'ext': 'mp4',
+        },
+    }, {
+        'url': 'https://skeb.jp/@furukawa_nob/works/3',
+        'info_dict': {
+            'id': '489408',
+            'title': 'いつもお世話になってお... by 古川ノブ@音楽とVlo...',
+            'descripion': 'md5:5adc2e41d06d33b558bf7b1faeb7b9c2',
+            'uploader': '古川ノブ@音楽とVlogのVtuber',
+            'uploader_id': 'furukawa_nob',
+            'age_limit': 0,
+            'tags': [
+                'よろしく', '大丈夫', 'お願い', 'でした',
+                '是非', 'O', 'バー', '遊び', 'おはよう',
+                'オーバ', 'ボイス',
+            ],
+            'url': r're:https://skeb.+',
+            'thumbnail': r're:https://skeb.+',
+            'subtitles': {
+                'jpn': [{
+                    'url': r're:https://skeb.+',
+                    'ext': 'vtt'
+                }]
+            },
+            'duration': 98,
+            'ext': 'mp3',
+            'vcodec': 'none',
+            'abr': 128,
+        },
+    }, {
+        'url': 'https://skeb.jp/@mollowmollow/works/6',
+        'info_dict': {
+            'id': '6',
+            'title': 'ヒロ。\n\n私のキャラク... by 諸々',
+            'descripion': 'md5:aa6cbf2ba320b50bce219632de195f07',
+            '_type': 'playlist',
+            'entries': [{
+                'id': '486430',
+                'title': 'ヒロ。\n\n私のキャラク... by 諸々',
+                'descripion': 'md5:aa6cbf2ba320b50bce219632de195f07',
+            }, {
+                'id': '486431',
+                'title': 'ヒロ。\n\n私のキャラク... by 諸々',
+            }]
+        }
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        nuxt_data = self._search_nuxt_data(self._download_webpage(url, video_id), video_id)
+
+        parent = {
+            'id': video_id,
+            'title': nuxt_data.get('title'),
+            'descripion': nuxt_data.get('description'),
+            'uploader': traverse_obj(nuxt_data, ('creator', 'name')),
+            'uploader_id': traverse_obj(nuxt_data, ('creator', 'screen_name')),
+            'age_limit': 18 if nuxt_data.get('nsfw') else 0,
+            'tags': nuxt_data.get('tag_list'),
+        }
+
+        entries = []
+        for item in nuxt_data.get('previews') or []:
+            vid_url = item.get('url')
+            given_ext = traverse_obj(item, ('information', 'extension'))
+            preview_ext = determine_ext(vid_url, default_ext=None)
+            if not preview_ext:
+                content_disposition = parse_qs(vid_url)['response-content-disposition'][0]
+                preview_ext = self._search_regex(
+                    r'filename="[^"]+\.([^\.]+?)"', content_disposition,
+                    'preview file extension', fatal=False, group=1)
+            if preview_ext not in ('mp4', 'mp3'):
+                continue
+            if not vid_url or not item.get('id'):
+                continue
+            width, height = traverse_obj(item, ('information', 'width')), traverse_obj(item, ('information', 'height'))
+            if width is not None and height is not None:
+                # the longest side is at most 720px for non-client viewers
+                max_size = max(width, height)
+                width, height = list(x * 720 // max_size for x in (width, height))
+            entries.append({
+                **parent,
+                'id': str(item['id']),
+                'url': vid_url,
+                'thumbnail': item.get('poster_url'),
+                'subtitles': {
+                    'jpn': [{
+                        'url': item.get('vtt_url'),
+                        'ext': 'vtt',
+                    }]
+                } if item.get('vtt_url') else None,
+                'width': width,
+                'height': height,
+                'duration': traverse_obj(item, ('information', 'duration')),
+                'fps': traverse_obj(item, ('information', 'frame_rate')),
+                'ext': preview_ext or given_ext,
+                'vcodec': 'none' if preview_ext == 'mp3' else None,
+                # you'll always get 128kbps MP3 for non-client viewers
+                'abr': 128 if preview_ext == 'mp3' else None,
+            })
+
+        if not entries:
+            raise ExtractorError('No video/audio attachment found in this commission.', expected=True)
+        elif len(entries) == 1:
+            return entries[0]
+        else:
+            parent.update({
+                '_type': 'playlist',
+                'entries': entries,
+            })
+            return parent
diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index 15cc4d3b2c..9d40060516 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -38,6 +38,7 @@ import time
 import traceback
 import xml.etree.ElementTree
 import zlib
+import mimetypes
 
 from .compat import (
     compat_HTMLParseError,
@@ -4715,6 +4716,14 @@ def mimetype2ext(mt):
     return subtype.replace('+', '.')
 
 
+def ext2mimetype(ext_or_url):
+    if not ext_or_url:
+        return None
+    if '.' not in ext_or_url:
+        ext_or_url = f'file.{ext_or_url}'
+    return mimetypes.guess_type(ext_or_url)[0]
+
+
 def parse_codecs(codecs_str):
     # http://tools.ietf.org/html/rfc6381
     if not codecs_str: