diff --git a/README.md b/README.md
index f3eeee0502..f2ae3a23f3 100644
--- a/README.md
+++ b/README.md
@@ -1782,7 +1782,7 @@ The following extractors use this feature:
 * `data_sync_id`: Overrides the account Data Sync ID used in Innertube API requests. This may be needed if you are using an account with `youtube:player_skip=webpage,configs` or `youtubetab:skip=webpage`
 * `visitor_data`: Overrides the Visitor Data used in Innertube API requests. This should be used with `player_skip=webpage,configs` and without cookies. Note: this may have adverse effects if used improperly. If a session from a browser is wanted, you should pass cookies instead (which contain the Visitor ID)
 * `po_token`:  Proof of Origin (PO) Token(s) to use. Comma seperated list of PO Tokens in the format `CLIENT.CONTEXT+PO_TOKEN`, e.g. `youtube:po_token=web.gvs+XXX,web.player=XXX,web_safari.gvs+YYY`. Context can be either `gvs` (Google Video Server URLs) or `player` (Innertube player request)
-* `force_js_variant`: The player javascript variant to use for signature and nsig deciphering. The available variants are `base`, `tce`, `tv`, `es6`, `phone`, `tablet`. Only `base` is recommended as a possible workaround; the others are mainly for debugging purposes. The default is to use what is prescribed by the site, and can be selected with `false`
+* `force_js_variant`: The player javascript variant to use for signature and nsig deciphering. The available variants are `main`, `tce`, `tv`, `tv_es6`, `phone`, `tablet`. Only `main` is recommended as a possible workaround; the others are mainly for debugging purposes. The default is to use what is prescribed by the site, and can be selected with `false`
 
 #### youtubetab (YouTube playlists, channels, feeds, etc.)
 * `skip`: One or more of `webpage` (skip initial webpage download), `authcheck` (allow the download of playlists requiring authentication when no initial webpage is downloaded. This may cause unwanted behavior, see [#1122](https://github.com/yt-dlp/yt-dlp/pull/1122) for more details)
diff --git a/yt_dlp/extractor/youtube/_video.py b/yt_dlp/extractor/youtube/_video.py
index f81fc11054..528afa984d 100644
--- a/yt_dlp/extractor/youtube/_video.py
+++ b/yt_dlp/extractor/youtube/_video.py
@@ -1761,10 +1761,10 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
     ]
 
     _PLAYER_JS_VARIANT_MAP = {
-        'base': '/s/player/{}/player_ias.vflset/en_US/base.js',
+        'main': '/s/player/{}/player_ias.vflset/en_US/base.js',
         'tce': '/s/player/{}/player_ias_tce.vflset/en_US/base.js',
         'tv': '/s/player/{}/tv-player-ias.vflset/tv-player-ias.js',
-        'es6': '/s/player/{}/tv-player-es6.vflset/tv-player-es6.js',
+        'tv_es6': '/s/player/{}/tv-player-es6.vflset/tv-player-es6.js',
         'phone': '/s/player/{}/player-plasma-ias-phone-en_US.vflset/base.js',
         'tablet': '/s/player/{}/player-plasma-ias-tablet-en_US.vflset/base.js',
     }