1 files changed, 86 insertions, 0 deletions
diff --git a/yt_dlp/extractor/howstuffworks.py b/yt_dlp/extractor/howstuffworks.py
new file mode 100644
index 0000000..238fc0b
--- /dev/null
+++ b/yt_dlp/extractor/howstuffworks.py
@@ -0,0 +1,86 @@
+from .common import InfoExtractor
+from ..utils import (
+    find_xpath_attr,
+    int_or_none,
+    js_to_json,
+    unescapeHTML,
+    determine_ext,
+)
+
+
+class HowStuffWorksIE(InfoExtractor):
+    _VALID_URL = r'https?://[\da-z-]+\.(?:howstuffworks|stuff(?:(?:youshould|theydontwantyouto)know|toblowyourmind|momnevertoldyou)|(?:brain|car)stuffshow|fwthinking|geniusstuff)\.com/(?:[^/]+/)*(?:\d+-)?(?P<id>.+?)-video\.htm'
+    _TESTS = [
+        {
+            'url': 'http://www.stufftoblowyourmind.com/videos/optical-illusions-video.htm',
+            'md5': '76646a5acc0c92bf7cd66751ca5db94d',
+            'info_dict': {
+                'id': '855410',
+                'ext': 'mp4',
+                'title': 'Your Trickster Brain: Optical Illusions -- Science on the Web',
+                'description': 'md5:e374ff9561f6833ad076a8cc0a5ab2fb',
+            },
+        },
+        {
+            'url': 'http://shows.howstuffworks.com/more-shows/why-does-balloon-stick-to-hair-video.htm',
+            'only_matching': True,
+        }
+    ]
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        clip_js = self._search_regex(
+            r'(?s)var clip = ({.*?});', webpage, 'clip info')
+        clip_info = self._parse_json(
+            clip_js, display_id, transform_source=js_to_json)
+
+        video_id = clip_info['content_id']
+        formats = []
+        m3u8_url = clip_info.get('m3u8')
+        if m3u8_url and determine_ext(m3u8_url) == 'm3u8':
+            formats.extend(self._extract_m3u8_formats(m3u8_url, video_id, 'mp4', format_id='hls', fatal=True))
+        flv_url = clip_info.get('flv_url')
+        if flv_url:
+            formats.append({
+                'url': flv_url,
+                'format_id': 'flv',
+            })
+        for video in clip_info.get('mp4', []):
+            formats.append({
+                'url': video['src'],
+                'format_id': 'mp4-%s' % video['bitrate'],
+                'vbr': int_or_none(video['bitrate'].rstrip('k')),
+            })
+
+        if not formats:
+            smil = self._download_xml(
+                'http://services.media.howstuffworks.com/videos/%s/smil-service.smil' % video_id,
+                video_id, 'Downloading video SMIL')
+
+            http_base = find_xpath_attr(
+                smil,
+                './{0}head/{0}meta'.format('{http://www.w3.org/2001/SMIL20/Language}'),
+                'name',
+                'httpBase').get('content')
+
+            URL_SUFFIX = '?v=2.11.3&fp=LNX 11,2,202,356&r=A&g=A'
+
+            for video in smil.findall(
+                    './{0}body/{0}switch/{0}video'.format('{http://www.w3.org/2001/SMIL20/Language}')):
+                vbr = int_or_none(video.attrib['system-bitrate'], scale=1000)
+                formats.append({
+                    'url': '%s/%s%s' % (http_base, video.attrib['src'], URL_SUFFIX),
+                    'format_id': '%dk' % vbr,
+                    'vbr': vbr,
+                })
+
+        return {
+            'id': '%s' % video_id,
+            'display_id': display_id,
+            'title': unescapeHTML(clip_info['clip_title']),
+            'description': unescapeHTML(clip_info.get('caption')),
+            'thumbnail': clip_info.get('video_still_url'),
+            'duration': int_or_none(clip_info.get('duration')),
+            'formats': formats,
+        }