diff --git a/pyrogram/client/filters/filters.py b/pyrogram/client/filters/filters.py
index 83493965..19218813 100644
--- a/pyrogram/client/filters/filters.py
+++ b/pyrogram/client/filters/filters.py
@@ -214,6 +214,10 @@ class Filters:
 
     from_scheduled = create(lambda _, m: bool(m.from_scheduled), "FromScheduledFilter")
     """Filter new automatically sent messages that were previously scheduled."""
+    
+    # Messages from linked channels are forwarded automatically by Telegram and have no sender (from_user is None).
+    linked_channel = create(lambda _, m: bool(m.forward_from_chat and not m.from_user), "LinkedChannelFilter")
+    """Filter messages that are automatically forwarded from the linked channel to the group chat."""
 
     @staticmethod
     def command(
@@ -319,7 +323,8 @@ class Filters:
             else:
                 raise ValueError("Regex filter doesn't work with {}".format(type(update)))
 
-            update.matches = list(flt.p.finditer(value)) or None
+            if value:
+                update.matches = list(flt.p.finditer(value)) or None
 
             return bool(update.matches)
 
diff --git a/pyrogram/client/methods/messages/send_animation.py b/pyrogram/client/methods/messages/send_animation.py
index acb93438..14b46b97 100644
--- a/pyrogram/client/methods/messages/send_animation.py
+++ b/pyrogram/client/methods/messages/send_animation.py
@@ -38,6 +38,7 @@ class SendAnimation(BaseClient):
         width: int = 0,
         height: int = 0,
         thumb: str = None,
+        file_name: str = None,
         disable_notification: bool = None,
         reply_to_message_id: int = None,
         schedule_date: int = None,
@@ -97,6 +98,10 @@ class SendAnimation(BaseClient):
                 A thumbnail's width and height should not exceed 320 pixels.
                 Thumbnails can't be reused and can be only uploaded as a new file.
 
+            file_name (``str``, *optional*):
+                File name of the animation sent.
+                Defaults to file's path basename.
+
             disable_notification (``bool``, *optional*):
                 Sends the message silently.
                 Users will receive a notification with no sound.
@@ -172,7 +177,7 @@ class SendAnimation(BaseClient):
                             w=width,
                             h=height
                         ),
-                        types.DocumentAttributeFilename(file_name=os.path.basename(animation)),
+                        types.DocumentAttributeFilename(file_name=file_name or os.path.basename(animation)),
                         types.DocumentAttributeAnimated()
                     ]
                 )
diff --git a/pyrogram/client/methods/messages/send_audio.py b/pyrogram/client/methods/messages/send_audio.py
index cd9d61b3..1aba6045 100644
--- a/pyrogram/client/methods/messages/send_audio.py
+++ b/pyrogram/client/methods/messages/send_audio.py
@@ -36,7 +36,8 @@ class SendAudio(BaseClient):
         duration: int = 0,
         performer: str = None,
         title: str = None,
-        thumb: str = None, disable_notification: bool = None,
+        thumb: str = None,file_name: str = None,
+        disable_notification: bool = None,
         reply_to_message_id: int = None,
         schedule_date: int = None,
         reply_markup: Union[
@@ -93,6 +94,10 @@ class SendAudio(BaseClient):
                 A thumbnail's width and height should not exceed 320 pixels.
                 Thumbnails can't be reused and can be only uploaded as a new file.
 
+            file_name (``str``, *optional*):
+                File name of the audio sent.
+                Defaults to file's path basename.
+
             disable_notification (``bool``, *optional*):
                 Sends the message silently.
                 Users will receive a notification with no sound.
@@ -170,7 +175,7 @@ class SendAudio(BaseClient):
                             performer=performer,
                             title=title
                         ),
-                        types.DocumentAttributeFilename(file_name=os.path.basename(audio))
+                        types.DocumentAttributeFilename(file_name=file_name or os.path.basename(audio))
                     ]
                 )
             elif audio.startswith("http"):
diff --git a/pyrogram/client/methods/messages/send_document.py b/pyrogram/client/methods/messages/send_document.py
index d01b1bd1..f2b268f1 100644
--- a/pyrogram/client/methods/messages/send_document.py
+++ b/pyrogram/client/methods/messages/send_document.py
@@ -34,6 +34,7 @@ class SendDocument(BaseClient):
         thumb: str = None,
         caption: str = "",
         parse_mode: Union[str, None] = object,
+        file_name: str = None,
         disable_notification: bool = None,
         reply_to_message_id: int = None,
         schedule_date: int = None,
@@ -80,6 +81,10 @@ class SendDocument(BaseClient):
                 Pass "html" to enable HTML-style parsing only.
                 Pass None to completely disable style parsing.
 
+            file_name (``str``, *optional*):
+                File name of the document sent.
+                Defaults to file's path basename.
+
             disable_notification (``bool``, *optional*):
                 Sends the message silently.
                 Users will receive a notification with no sound.
@@ -146,7 +151,7 @@ class SendDocument(BaseClient):
                     file=file,
                     thumb=thumb,
                     attributes=[
-                        types.DocumentAttributeFilename(file_name=os.path.basename(document))
+                        types.DocumentAttributeFilename(file_name=file_name or os.path.basename(document))
                     ]
                 )
             elif document.startswith("http"):
diff --git a/pyrogram/client/methods/messages/send_video.py b/pyrogram/client/methods/messages/send_video.py
index b28062b7..4c8bd2fc 100644
--- a/pyrogram/client/methods/messages/send_video.py
+++ b/pyrogram/client/methods/messages/send_video.py
@@ -37,6 +37,7 @@ class SendVideo(BaseClient):
         width: int = 0,
         height: int = 0,
         thumb: str = None,
+        file_name: str = None,
         supports_streaming: bool = True,
         disable_notification: bool = None,
         reply_to_message_id: int = None,
@@ -93,6 +94,10 @@ class SendVideo(BaseClient):
                 A thumbnail's width and height should not exceed 320 pixels.
                 Thumbnails can't be reused and can be only uploaded as a new file.
 
+            file_name (``str``, *optional*):
+                File name of the video sent.
+                Defaults to file's path basename.
+
             supports_streaming (``bool``, *optional*):
                 Pass True, if the uploaded video is suitable for streaming.
                 Defaults to True.
@@ -169,7 +174,7 @@ class SendVideo(BaseClient):
                             w=width,
                             h=height
                         ),
-                        types.DocumentAttributeFilename(file_name=os.path.basename(video))
+                        types.DocumentAttributeFilename(file_name=file_name or os.path.basename(video))
                     ]
                 )
             elif video.startswith("http"):