diff --git a/src/graphics/presentation/videoOut.cpp b/src/graphics/presentation/videoOut.cpp
index c8b047a0a..957ccf53a 100644
--- a/src/graphics/presentation/videoOut.cpp
+++ b/src/graphics/presentation/videoOut.cpp
@@ -43,6 +43,9 @@ constexpr int      VIDEO_OUT_EVENT_PRE_VBLANK_START                     = 2;
 constexpr int      VIDEO_OUT_EVENT_SET_MODE                             = 8;
 constexpr int      VIDEO_OUT_TRUE                                       = 1;
 constexpr int      VIDEO_OUT_FALSE                                      = 0;
+constexpr int      VIDEO_OUT_BUS_TYPE_MAIN                              = 0;
+constexpr int      VIDEO_OUT_BUS_TYPE_OVERLAY                           = 1;
+constexpr int      VIDEO_OUT_BUS_TYPE_SUB                               = 2;
 constexpr int      VIDEO_OUT_FLIP_MODE_VSYNC                            = 1;
 constexpr int      VIDEO_OUT_FLIP_MODE_VSYNC_MULTI                      = 4;
 constexpr int      VIDEO_OUT_BUFFER_INDEX_BLACK                         = -2;
@@ -234,7 +237,7 @@ private:
 
 struct VideoOutDriver::Impl {
 public:
-	static constexpr int VIDEO_OUT_NUM_MAX = 2;
+	static constexpr int VIDEO_OUT_NUM_MAX = 4;
 
 	Impl(uint32_t width, uint32_t height, Graphics::Presenter& presenter)
 	    : m_renderer(presenter.Renderer()), m_presenter(presenter), m_flip_queue(presenter) {
@@ -245,7 +248,7 @@ public:
 	~Impl();
 	KYTY_CLASS_NO_COPY(Impl);
 
-	int             Open();
+	int             Open(int bus_type);
 	bool            Close(int handle);
 	VideoOutConfig* Get(int handle);
 	VideoOutConfig* Get(int handle, uint64_t& generation);
@@ -607,19 +610,11 @@ void VideoOutDriver::Impl::Init(uint32_t width, uint32_t height) {
 	}
 }
 
-int VideoOutDriver::Impl::Open() {
+int VideoOutDriver::Impl::Open(int bus_type) {
 	Common::LockGuard lock(m_mutex);
 
-	int handle = -1;
-
-	for (int i = 1; i < VIDEO_OUT_NUM_MAX; i++) {
-		if (!m_video_out_ctx[i].opened) {
-			handle = i;
-			break;
-		}
-	}
-
-	if (handle < 0) {
+	const int handle = bus_type + 1;
+	if (m_video_out_ctx[handle].opened) {
 		return -1;
 	}
 	auto&             config = m_video_out_ctx[handle];
@@ -1173,12 +1168,15 @@ KYTY_SYSV_ABI int VideoOutOpen(int user_id, int bus_type, int index, const void*
 	PRINT_NAME();
 
 	EXIT_NOT_IMPLEMENTED(user_id != 255 && user_id != 0);
-	EXIT_NOT_IMPLEMENTED(bus_type != 0);
+	if (bus_type != VIDEO_OUT_BUS_TYPE_MAIN && bus_type != VIDEO_OUT_BUS_TYPE_OVERLAY &&
+	    bus_type != VIDEO_OUT_BUS_TYPE_SUB) {
+		return VIDEO_OUT_ERROR_INVALID_VALUE;
+	}
 	EXIT_NOT_IMPLEMENTED(index != 0);
 
 	LOGF("\t param = 0x%016" PRIx64 "\n", reinterpret_cast<uint64_t>(param));
 
-	int handle = DriverState().Open();
+	int handle = DriverState().Open(bus_type);
 
 	if (handle < 0) {
 		return VIDEO_OUT_ERROR_RESOURCE_BUSY;