Warn user if a video note will be treated as a video (#201)

Author: Danipulok

pyrogram/methods/messages/send_video_note.py

@@ -28,6 +28,9 @@
 
 log = logging.getLogger(__name__)
 
+# Maximum file size for local video note (10 MB)
+_MAX_VIDEO_NOTE_SIZE_BYTES: int = 10 * 1024 * 1024
+
 class SendVideoNote:
     async def send_video_note(
         self: "pyrogram.Client",
@@ -80,6 +83,10 @@ async def send_video_note(
                 pass a file path as string to upload a new video note that exists on your local machine, or
                 pass a binary file-like object with its attribute ".name" set for in-memory uploads.
                 Sending video notes by a URL is currently unsupported.
+                
+                .. note::
+                    When uploading from local file: if the file is larger than 10 MB, Telegram will upload 
+                    it as a regular video instead of a video note.
 
             duration (``int``, *optional*):
                 Duration of sent video in seconds.
@@ -238,6 +245,16 @@ async def send_video_note(
         try:
             if isinstance(video_note, str):
                 if os.path.isfile(video_note):
+
+                    # Notify user why the sent video is not video note
+                    file_size = os.path.getsize(video_note)
+                    if file_size > _MAX_VIDEO_NOTE_SIZE_BYTES:
+                        log.warning(
+                           "Video note file size (%.1f MB) exceeds 10 MB limit. "
+                           "Telegram will treat it as a regular video instead of a video note.",
+                           file_size / (1024 * 1024),
+                        )
+
                     thumb = await self.save_file(thumb)
                     file = await self.save_file(video_note, progress=progress, progress_args=progress_args)
                     media = raw.types.InputMediaUploadedDocument(
@@ -306,4 +323,4 @@ async def send_video_note(
 
                     return messages[0] if messages else None
         except StopTransmission:
-            return None
+            return None