Restore AVSampleDisplayLayer renderer for dGPU/eGPU systems

These sometimes have issues importing decoded frames for Metal rendering.

app/streaming/video/ffmpeg.cpp

@@ -825,7 +825,8 @@ IFFmpegRenderer* FFmpegVideoDecoder::createHwAccelRenderer(const AVCodecHWConfig
 #endif
 #ifdef Q_OS_DARWIN
         case AV_HWDEVICE_TYPE_VIDEOTOOLBOX:
-            return VTRendererFactory::createRenderer();
+            // Prefer the Metal renderer if hardware is compatible
+            return VTMetalRendererFactory::createRenderer();
 #endif
 #ifdef HAVE_LIBVA
         case AV_HWDEVICE_TYPE_VAAPI:
@@ -864,6 +865,11 @@ IFFmpegRenderer* FFmpegVideoDecoder::createHwAccelRenderer(const AVCodecHWConfig
         case AV_HWDEVICE_TYPE_D3D11VA:
             return new D3D11VARenderer(pass);
 #endif
+#ifdef Q_OS_DARWIN
+        case AV_HWDEVICE_TYPE_VIDEOTOOLBOX:
+            // Use the older AVSampleBufferDisplayLayer if Metal cannot be used
+            return VTRendererFactory::createRenderer();
+#endif
 #ifdef HAVE_LIBVA
         case AV_HWDEVICE_TYPE_VAAPI:
             return new VAAPIRenderer(pass);