Fix wrong video dimensions for some rotated videos (#33008)

app/lib/video_metadata_extractor.rb

@@ -46,6 +46,9 @@ class VideoMetadataExtractor
         # For some video streams the frame_rate reported by `ffprobe` will be 0/0, but for these streams we
         # should use `r_frame_rate` instead. Video screencast generated by Gnome Screencast have this issue.
         @frame_rate ||= @r_frame_rate
+        # If the video has not been re-encoded by ffmpeg, it may contain rotation information,
+        # and we need to simulate applying it to the dimensions
+        @width, @height = @height, @width if video_stream[:side_data_list]&.any? { |x| x[:rotation].abs == 90 }
       end
 
       if (audio_stream = audio_streams.first)