diff --git a/youtube_dl/extractor/twitter.py b/youtube_dl/extractor/twitter.py
index cfa7a7326..f33f49fd3 100644
--- a/youtube_dl/extractor/twitter.py
+++ b/youtube_dl/extractor/twitter.py
@@ -31,7 +31,7 @@ from .periscope import (
 
 class TwitterBaseIE(InfoExtractor):
     _API_BASE = 'https://api.twitter.com/1.1/'
-    _BASE_REGEX = r'https?://(?:(?:www|m(?:obile)?)\.)?twitter\.com/'
+    _BASE_REGEX = r'https?://(?:(?:www|m(?:obile)?)\.)?(?:twitter|x)\.com/'  # FIX: support x.com domain
     _GUEST_TOKEN = None
 
     def _extract_variant_formats(self, variant, video_id):