Use the same X display name for VDPAU that SDL is using

app/streaming/video/ffmpeg-renderers/vdpau.cpp

@@ -135,9 +135,15 @@ bool VDPAURenderer::initialize(PDECODER_PARAMETERS params)
     m_VideoWidth = params->width;
     m_VideoHeight = params->height;
 
+    char* displayName = nullptr;
+#ifdef HAS_X11
+    SDL_assert(info.subsystem == SDL_SYSWM_X11);
+    displayName = XDisplayString(info.info.x11.display);
+#endif
+
     err = av_hwdevice_ctx_create(&m_HwContext,
                                  AV_HWDEVICE_TYPE_VDPAU,
-                                 nullptr, nullptr, 0);
+                                 displayName, nullptr, 0);
 
 #if defined(APP_IMAGE) || defined(USE_FALLBACK_DRIVER_PATHS)
     // AppImages will be running with our libvdpau.so which means they don't know about