fix: built-in downloader prefers separate streams over 360p muxed (v1.0.0.16)

When YouTube offered a muxed stream, it was always taken, but muxed streams
are 360p only. Use muxed only when the separate video+audio streams are
missing or not better.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

build.yaml

@@ -1,5 +1,5 @@
 ---
-version: 1.0.0.15
+version: 1.0.0.16
 name: CinemaTrailers4Jellyfins
 guid: b581493e-1046-40ed-b6dc-cb8027624984
 description: >
@@ -12,10 +12,9 @@ category: General
 owner: 514mart
 targetAbi: 10.11.0.0
 changelog:
-  - Trailer Languages now also checks the original language of the movie or
-    show. Before, only the trailer's own language tag was checked, and
-    TMDB often tags subtitled foreign trailers as English, so Korean,
-    Chinese or Japanese trailers got through
+  - The built-in downloader no longer picks YouTube's 360p combined file
+    when separate video and audio streams give a better picture. This
+    mostly showed up when yt-dlp failed and the built-in downloader took over
 
 dotnetProjects:
   - name: Jellyfin.Plugin.CinemaTrailers4Jellyfins