[DiscoveryPlus] Add discoveryplus.in (#203)

Closes #201

yt_dlp/extractor/dplay.py

@@ -296,6 +296,51 @@ class DPlayIE(InfoExtractor):
             url, display_id, host, 'dplay' + country, country)
 
 
+class DiscoveryPlusIndiaIE(DPlayIE):
+    _VALID_URL = r'https?://(?:www\.)?discoveryplus\.in/videos?' + DPlayIE._PATH_REGEX
+    _TESTS = [{
+        'url': 'https://www.discoveryplus.in/videos/how-do-they-do-it/fugu-and-more?seasonId=8&type=EPISODE',
+        'info_dict': {
+            'id': '27104',
+            'ext': 'mp4',
+            'display_id': 'how-do-they-do-it/fugu-and-more',
+            'title': 'Fugu and More',
+            'description': 'The Japanese catch, prepare and eat the deadliest fish on the planet.',
+            'duration': 1319,
+            'timestamp': 1582309800,
+            'upload_date': '20200221',
+            'series': 'How Do They Do It?',
+            'season_number': 8,
+            'episode_number': 2,
+            'creator': 'Discovery Channel',
+        },
+        'params': {
+            'format': 'bestvideo',
+            'skip_download': True,
+        },
+        'skip': 'Cookies (not necessarily logged in) are needed'
+    }]
+
+    def _update_disco_api_headers(self, headers, disco_base, display_id, realm):
+        headers['x-disco-params'] = 'realm=%s' % realm
+        headers['x-disco-client'] = 'WEB:UNKNOWN:dplus-india:17.0.0'
+
+    def _download_video_playback_info(self, disco_base, video_id, headers):
+        return self._download_json(
+            disco_base + 'playback/v3/videoPlaybackInfo',
+            video_id, headers=headers, data=json.dumps({
+                'deviceInfo': {
+                    'adBlocker': False,
+                },
+                'videoId': video_id,
+            }).encode('utf-8'))['data']['attributes']['streaming']
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        return self._get_disco_api_info(
+            url, display_id, 'ap2-prod-direct.discoveryplus.in', 'dplusindia', 'in')
+
+
 class DiscoveryPlusIE(DPlayIE):
     _VALID_URL = r'https?://(?:www\.)?discoveryplus\.com/video' + DPlayIE._PATH_REGEX
     _TESTS = [{

yt_dlp/extractor/extractors.py

@@ -315,6 +315,7 @@ from .douyutv import (
 from .dplay import (
     DPlayIE,
     DiscoveryPlusIE,
+    DiscoveryPlusIndiaIE,
     HGTVDeIE,
 )
 from .dreisat import DreiSatIE