Merge 'ytdl-org/youtube-dl/master' release 2020.11.19

Old Extractors left behind:
	VLivePlaylistIE
	YoutubeSearchURLIE
	YoutubeShowIE
	YoutubeFavouritesIE

If removing old extractors, make corresponding changes in
	docs/supportedsites.md
	youtube_dlc/extractor/extractors.py

Not merged:
	.github/ISSUE_TEMPLATE/1_broken_site.md
	.github/ISSUE_TEMPLATE/2_site_support_request.md
	.github/ISSUE_TEMPLATE/3_site_feature_request.md
	.github/ISSUE_TEMPLATE/4_bug_report.md
	.github/ISSUE_TEMPLATE/5_feature_request.md
	test/test_all_urls.py
	youtube_dlc/version.py
	Changelog

youtube_dlc/extractor/extractors.py

@@ -62,7 +62,7 @@ from .ard import (
     ARDMediathekIE,
 )
 from .arte import (
-    ArteTVPlus7IE,
+    ArteTVIE,
     ArteTVEmbedIE,
     ArteTVPlaylistIE,
 )
@@ -542,6 +542,7 @@ from .laola1tv import (
     EHFTVIE,
     ITTFIE,
 )
+from .lbry import LBRYIE
 from .lci import LCIIE
 from .lcp import (
     LcpPlayIE,
@@ -1079,8 +1080,7 @@ from .spankbang import (
     SpankBangPlaylistIE,
 )
 from .spankwire import SpankwireIE
-from .spiegel import SpiegelIE, SpiegelArticleIE
-from .spiegeltv import SpiegeltvIE
+from .spiegel import SpiegelIE
 from .spike import (
     BellatorIE,
     ParamountNetworkIE,
@@ -1505,12 +1505,11 @@ from .yourporn import YourPornIE
 from .yourupload import YourUploadIE
 from .youtube import (
     YoutubeIE,
-    YoutubeChannelIE,
     YoutubeFavouritesIE,
     YoutubeHistoryIE,
     YoutubeLiveIE,
+    YoutubeTabIE,
     YoutubePlaylistIE,
-    YoutubePlaylistsIE,
     YoutubeRecommendedIE,
     YoutubeSearchDateIE,
     YoutubeSearchIE,
@@ -1519,7 +1518,7 @@ from .youtube import (
     YoutubeSubscriptionsIE,
     YoutubeTruncatedIDIE,
     YoutubeTruncatedURLIE,
-    YoutubeUserIE,
+    YoutubeYtUserIE,
     YoutubeWatchLaterIE,
 )
 from .zapiks import ZapiksIE