[extractor/screencastify] Add extractor (#5604)

Closes #5603
Authored by: bashonly

yt_dlp/extractor/_extractors.py

@@ -1603,6 +1603,7 @@
 from .sbs import SBSIE
 from .screen9 import Screen9IE
 from .screencast import ScreencastIE
+from .screencastify import ScreencastifyIE
 from .screencastomatic import ScreencastOMaticIE
 from .scrippsnetworks import (
     ScrippsNetworksWatchIE,

yt_dlp/extractor/screencastify.py

@@ -0,0 +1,52 @@
+import urllib.parse
+
+from .common import InfoExtractor
+from ..utils import traverse_obj, update_url_query
+
+
+class ScreencastifyIE(InfoExtractor):
+    _VALID_URL = r'https?://watch\.screencastify\.com/v/(?P<id>[^/?#]+)'
+    _TESTS = [{
+        'url': 'https://watch.screencastify.com/v/sYVkZip3quLKhHw4Ybk8',
+        'info_dict': {
+            'id': 'sYVkZip3quLKhHw4Ybk8',
+            'ext': 'mp4',
+            'title': 'Inserting and Aligning the Case Top and Bottom',
+            'description': '',
+            'uploader': 'Paul Gunn',
+            'extra_param_to_segment_url': str,
+        },
+        'params': {
+            'skip_download': 'm3u8',
+        },
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        info = self._download_json(
+            f'https://umbrella.svc.screencastify.com/api/umbrellaService/watch/{video_id}', video_id)
+
+        query_string = traverse_obj(info, ('manifest', 'auth', 'query'))
+        query = urllib.parse.parse_qs(query_string)
+        formats = []
+        dash_manifest_url = traverse_obj(info, ('manifest', 'url'))
+        if dash_manifest_url:
+            formats.extend(
+                self._extract_mpd_formats(
+                    dash_manifest_url, video_id, mpd_id='dash', query=query, fatal=False))
+        hls_manifest_url = traverse_obj(info, ('manifest', 'hlsUrl'))
+        if hls_manifest_url:
+            formats.extend(
+                self._extract_m3u8_formats(
+                    hls_manifest_url, video_id, ext='mp4', m3u8_id='hls', query=query, fatal=False))
+        for f in formats:
+            f['url'] = update_url_query(f['url'], query)
+
+        return {
+            'id': video_id,
+            'title': info.get('title'),
+            'description': info.get('description'),
+            'uploader': info.get('userName'),
+            'formats': formats,
+            'extra_param_to_segment_url': query_string,
+        }