Fix videos posting as downloadable documents instead of playable videos

Root cause of a real report (Russia Airsoft Awards post): none of the five
send_video/InputMediaVideo call sites in tg_poster.py set
supports_streaming=True. Without it, Telegram doesn't prepare the upload
for progressive/inline playback - showing "00:00" duration with a plain
download prompt on desktop, and, when it does play on mobile, audio with a
black video (same underlying cause as the faststart fix, but that only
handles the local moov-atom position; Telegram's own server-side handling
of the upload needs the flag regardless).

The real post went through the rich-message/file_id path
(upload_media_for_file_ids -> sendRichMessage): a file_id bakes in whatever
attributes the video was uploaded with, so fixing that call site fixes
every future post reusing the id. Also pass width/height/duration
explicitly everywhere instead of relying on Telegram's own probing, and
carry those through the plain-caption/media-group fallback paths for
consistency.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/tg_poster.py

@@ -161,7 +161,10 @@ class TelegramPoster:
             if item.media_type == "photo":
                 group.append(InputMediaPhoto(media=fs))
             else:
-                group.append(InputMediaVideo(media=fs))
+                group.append(InputMediaVideo(
+                    media=fs, supports_streaming=True,
+                    width=item.width, height=item.height, duration=item.duration_sec,
+                ))
 
         if not group:
             return file_ids
@@ -178,7 +181,14 @@ class TelegramPoster:
                         file_ids[item.attachment_id] = msg.photo[-1].file_id
                 else:
                     msg = await self.tg_retry_media(
-                        lambda: self.bot.send_video(video=fs, **self.chat_kwargs(chat_id, thread_id, use_storage))
+                        lambda: self.bot.send_video(
+                            video=fs,
+                            supports_streaming=True,
+                            width=item.width,
+                            height=item.height,
+                            duration=item.duration_sec,
+                            **self.chat_kwargs(chat_id, thread_id, use_storage),
+                        )
                     )
                     if msg.video:
                         file_ids[item.attachment_id] = msg.video.file_id
@@ -307,7 +317,10 @@ class TelegramPoster:
             if item.media_type == "photo":
                 input_media.append({"type": "photo", "media": val})
             else:
-                input_media.append({"type": "video", "media": val})
+                input_media.append({
+                    "type": "video", "media": val,
+                    "width": item.width, "height": item.height, "duration": item.duration_sec,
+                })
 
         if not input_media:
             # Text only post
@@ -341,6 +354,10 @@ class TelegramPoster:
                         video=item["media"],
                         caption=first_caption or None,
                         parse_mode="HTML",
+                        supports_streaming=True,
+                        width=item.get("width"),
+                        height=item.get("height"),
+                        duration=item.get("duration"),
                         **self.chat_kwargs(chat_id, thread_id),
                     )
                 )
@@ -352,7 +369,10 @@ class TelegramPoster:
                 if item["type"] == "photo":
                     group.append(InputMediaPhoto(media=item["media"], caption=cap, parse_mode="HTML"))
                 else:
-                    group.append(InputMediaVideo(media=item["media"], caption=cap, parse_mode="HTML"))
+                    group.append(InputMediaVideo(
+                        media=item["media"], caption=cap, parse_mode="HTML", supports_streaming=True,
+                        width=item.get("width"), height=item.get("height"), duration=item.get("duration"),
+                    ))
             msgs = await self.tg_retry_media(
                 lambda: self.bot.send_media_group(media=group, **self.chat_kwargs(chat_id, thread_id))
             )
@@ -365,7 +385,10 @@ class TelegramPoster:
             g = [
                 InputMediaPhoto(media=item["media"])
                 if item["type"] == "photo"
-                else InputMediaVideo(media=item["media"])
+                else InputMediaVideo(
+                    media=item["media"], supports_streaming=True,
+                    width=item.get("width"), height=item.get("height"), duration=item.get("duration"),
+                )
                 for item in chunk
             ]
             msgs = await self.tg_retry_media(