fix(924): the no-video-stream error allows for a file that really has none, and the record names library 16

Review round 1 nits:
- SelectVideoStream's message stated "its media statistics have not been
  read" as fact. A file that genuinely has no video stream (an audio-only
  local file, or a Jellyfin item whose playback info has no video, where
  ProjectToMediaVersion returns None) would send an operator round a
  deep-scan loop that can never succeed. The message now covers both cases.
- scan.mediaserver-statistics-from-server said "library 8". Prod's Jellyfin
  "Music Videos" library is id 16; no Library row has Id 8 (measured by
  media-management, 2026-10-21).
- The ersatztv skill's symptom note named "images before the #924 fix"
  instead of the release that carries it (v26.16.0).

Refs #924
Decisions-Edit: yes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: 99d1dedb-f027-4e05-baab-2111f3a7d951

.claude/skills/ersatztv/SKILL.md

@@ -472,11 +472,11 @@ docker start ersatztv
 ### Common Mistakes (check every time)
 - **Playout not building**: Three things must all be correct: (1) `ProgramScheduleOneItem` row exists for the schedule item, (2) `PlaybackOrder=3` (Shuffle), (3) `ScheduleKind=1` on Playout. Missing any one results in 0 playout items — this is the most common issue.
 - **Collection queries fail**: `CollectionItem` has no `Id` column — use `rowid` for counting. Content lookup goes through `MediaVersion.MovieId` → `MediaFile.Path` (not a generic MediaItemId join).
-- **Channel won't start — "has no video stream on record"** (images before the ersatztv#924 fix log a bare
+- **Channel won't start — "has no video stream on record"** (images before v26.16.0, which carries the ersatztv#924 fix, log a bare
   `Sequence contains no matching element` at `FFmpegStreamSelector.SelectVideoStream`): the playing item's
   `MediaVersion` has no `MediaStream` rows. Deep-scan its library — `POST /api/v1/libraries/{id}/scan?deep=true`;
-  a regular scan skips items whose server etag is unchanged and cannot heal them. Jellyfin music videos scanned
-  before that fix were all stored without streams (`scan.mediaserver-statistics-from-server`).
+  a regular scan skips items whose server etag is unchanged and cannot heal them. If the file itself has no video
+  stream, no scan heals it. Jellyfin music videos scanned before that fix were all stored without streams (`scan.mediaserver-statistics-from-server`).
 - **Channel logos forgotten**: After creating a channel, add an Artwork row (ArtworkKind=2) + logo file, then run `fix_logos.py` to push to Jellyfin. Without this, the channel shows no logo in the EPG.
 - **Playout reset required**: After any schedule/collection change, run `POST /api/v1/channels/{id}/playout/reset`. Wait 5-10s for the playout to build before verifying item count.
 

ErsatzTV.Core/FFmpeg/FFmpegStreamSelector.cs

@@ -58,9 +58,10 @@ public class FFmpegStreamSelector : IFFmpegStreamSelector
         return Task.FromException<MediaStream>(
             new InvalidOperationException(
                 $"Media version {version.Id} ({path}) has no video stream on record, so it cannot be played. " +
-                "Its media statistics have not been read: rescan the item's library to read them (for a " +
+                "If its media statistics were never read, rescan the item's library to read them (for a " +
                 "Jellyfin/Emby/Plex library, a deep scan, since a regular scan skips items the server reports " +
-                "unchanged)."));
+                "unchanged). If the file itself has no video stream, a rescan cannot help: remove it from " +
+                "video channels."));
     }
 
     public async Task<Option<MediaStream>> SelectAudioStream(

docs/decisions/records/scan/mediaserver-statistics-from-server.md

@@ -14,7 +14,7 @@ The Jellyfin and Emby library-items projections build every movie, episode and m
 `Streams = []` and no dimensions; only the per-item playback info carries them. The movie and TV scanners fetch
 statistics when the item is new, changed, deep-scanned or has no stored streams. The music-video scanner wrote
 the projection's version instead, so every Jellyfin music video was stored without streams and
-`FFmpegStreamSelector.SelectVideoStream` threw on play. Measured on prod 2026-10-21 (#924): library 8, 1520 of
+`FFmpegStreamSelector.SelectVideoStream` threw on play. Measured on prod 2026-10-21 (#924): the Jellyfin "Music Videos" library (id 16), 1520 of
 1520 music-video versions with zero `MediaStream` rows (movies 0, episodes 4).
 
 - **Writing the projection is worse than writing nothing.** `IMetadataRepository.UpdateStatistics` reconciles