diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 74b50ecca..4920a30b8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -82,7 +82,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-          python-version: '3.x'
+          python-version: '3.8'
     - name: Install Requirements
       run: pip install pyinstaller
     - name: Bump version
@@ -116,7 +116,7 @@ jobs:
     - name: Set up Python 3.5.4 32-Bit
       uses: actions/setup-python@v2
       with:
-          python-version: '3.5.4'
+          python-version: '3.4.4'
           architecture: 'x86'
     - name: Install Requirements for 32 Bit
       run: pip install pyinstaller==3.5
diff --git a/youtube_dlc/downloader/external.py b/youtube_dlc/downloader/external.py
index c31f8910a..d2f8f271d 100644
--- a/youtube_dlc/downloader/external.py
+++ b/youtube_dlc/downloader/external.py
@@ -115,8 +115,10 @@ class CurlFD(ExternalFD):
 
     def _make_cmd(self, tmpfilename, info_dict):
         cmd = [self.exe, '--location', '-o', tmpfilename]
-        for key, val in info_dict['http_headers'].items():
-            cmd += ['--header', '%s: %s' % (key, val)]
+        if info_dict.get('http_headers') is not None:
+            for key, val in info_dict['http_headers'].items():
+                cmd += ['--header', '%s: %s' % (key, val)]
+
         cmd += self._bool_option('--continue-at', 'continuedl', '-', '0')
         cmd += self._valueless_option('--silent', 'noprogress')
         cmd += self._valueless_option('--verbose', 'verbose')
@@ -150,8 +152,9 @@ class AxelFD(ExternalFD):
 
     def _make_cmd(self, tmpfilename, info_dict):
         cmd = [self.exe, '-o', tmpfilename]
-        for key, val in info_dict['http_headers'].items():
-            cmd += ['-H', '%s: %s' % (key, val)]
+        if info_dict.get('http_headers') is not None:
+            for key, val in info_dict['http_headers'].items():
+                cmd += ['-H', '%s: %s' % (key, val)]
         cmd += self._configuration_args()
         cmd += ['--', info_dict['url']]
         return cmd
@@ -162,8 +165,9 @@ class WgetFD(ExternalFD):
 
     def _make_cmd(self, tmpfilename, info_dict):
         cmd = [self.exe, '-O', tmpfilename, '-nv', '--no-cookies']
-        for key, val in info_dict['http_headers'].items():
-            cmd += ['--header', '%s: %s' % (key, val)]
+        if info_dict.get('http_headers') is not None:
+            for key, val in info_dict['http_headers'].items():
+                cmd += ['--header', '%s: %s' % (key, val)]
         cmd += self._option('--limit-rate', 'ratelimit')
         retry = self._option('--tries', 'retries')
         if len(retry) == 2:
@@ -189,8 +193,9 @@ class Aria2cFD(ExternalFD):
         if dn:
             cmd += ['--dir', dn]
         cmd += ['--out', os.path.basename(tmpfilename)]
-        for key, val in info_dict['http_headers'].items():
-            cmd += ['--header', '%s: %s' % (key, val)]
+        if info_dict.get('http_headers') is not None:
+            for key, val in info_dict['http_headers'].items():
+                cmd += ['--header', '%s: %s' % (key, val)]
         cmd += self._option('--interface', 'source_address')
         cmd += self._option('--all-proxy', 'proxy')
         cmd += self._bool_option('--check-certificate', 'nocheckcertificate', 'false', 'true', '=')
@@ -206,8 +211,10 @@ class HttpieFD(ExternalFD):
 
     def _make_cmd(self, tmpfilename, info_dict):
         cmd = ['http', '--download', '--output', tmpfilename, info_dict['url']]
-        for key, val in info_dict['http_headers'].items():
-            cmd += ['%s:%s' % (key, val)]
+
+        if info_dict.get('http_headers') is not None:
+            for key, val in info_dict['http_headers'].items():
+                cmd += ['%s:%s' % (key, val)]
         return cmd
 
 
@@ -253,7 +260,7 @@ class FFmpegFD(ExternalFD):
         # if end_time:
         #     args += ['-t', compat_str(end_time - start_time)]
 
-        if info_dict['http_headers'] and re.match(r'^https?://', url):
+        if info_dict.get('http_headers') is not None and re.match(r'^https?://', url):
             # Trailing \r\n after each HTTP header is important to prevent warning from ffmpeg/avconv:
             # [http @ 00000000003d2fa0] No trailing CRLF found in HTTP header.
             headers = handle_youtubedl_headers(info_dict['http_headers'])
diff --git a/youtube_dlc/extractor/youtube.py b/youtube_dlc/extractor/youtube.py
index 0dbb3531c..d8d12a721 100644
--- a/youtube_dlc/extractor/youtube.py
+++ b/youtube_dlc/extractor/youtube.py
@@ -299,6 +299,7 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
 
 
 class YoutubeEntryListBaseInfoExtractor(YoutubeBaseInfoExtractor):
+
     def _find_entries_in_json(self, extracted):
         entries = []
         c = {}
@@ -366,6 +367,7 @@ class YoutubeEntryListBaseInfoExtractor(YoutubeBaseInfoExtractor):
                         'https://www.youtube.com%s' % continuation_url,
                         playlist_id,
                         'Downloading page #%s%s' % (page_num, ' (retry #%d)' % count if count else ''),
+
                         transform_source=uppercase_escape,
                         query={
                             'key': try_get(yt_conf, lambda x: x['INNERTUBE_API_KEY'])
@@ -428,6 +430,7 @@ class YoutubePlaylistsBaseInfoExtractor(YoutubeEntryListBaseInfoExtractor):
 
     def _process_entries(self, entries, seen):
         for playlist_id in orderedSet(try_get(r, lambda x: x['playlistId']) for r in entries):
+
             yield self.url_result(
                 'https://www.youtube.com/playlist?list=%s' % playlist_id, 'YoutubePlaylist')
 
diff --git a/youtube_dlc/extractor/zoom.py b/youtube_dlc/extractor/zoom.py
index 003e1f901..038a90297 100644
--- a/youtube_dlc/extractor/zoom.py
+++ b/youtube_dlc/extractor/zoom.py
@@ -13,7 +13,7 @@ from ..utils import (
 
 class ZoomIE(InfoExtractor):
     IE_NAME = 'zoom'
-    _VALID_URL = r'https://(?:.*).?zoom.us/rec(?:ording)?/play/(?P<id>[A-Za-z0-9\-_]+)'
+    _VALID_URL = r'https://(?:.*).?zoom.us/rec(?:ording)?/(play|share)/(?P<id>[A-Za-z0-9\-_.]+)'
 
     _TEST = {
         'url': 'https://zoom.us/recording/play/SILVuCL4bFtRwWTtOCFQQxAsBQsJljFtm9e4Z_bvo-A8B-nzUSYZRNuPl3qW5IGK',