expiration in UTC

pytube/streams.py

@@ -174,7 +174,7 @@ class Stream:
     @property
     def expiration(self) -> datetime:
         expire = parse_qs(self.url.split("?")[1])["expire"][0]
-        return datetime.fromtimestamp(int(expire))
+        return datetime.utcfromtimestamp(int(expire))
 
     @property
     def default_filename(self) -> str:

tests/test_streams.py

@@ -61,7 +61,7 @@ def test_title(cipher_signature):
 
 
 def test_expiration(cipher_signature):
-    assert cipher_signature.streams[0].expiration == datetime(2020, 1, 15, 21, 12, 5)
+    assert cipher_signature.streams[0].expiration == datetime(2020, 1, 16, 5, 12, 5)
 
 
 def test_caption_tracks(presigned_video):