Add documentation for Video classes (closes #2732)

modules/video/include/renderablevideoplane.h

@@ -45,6 +45,8 @@ public:
     void render(const RenderData& data, RendererTasks& rendererTask) override;
     void update(const UpdateData& data) override;
 
+    static documentation::Documentation Documentation();
+
 protected:
     virtual void bindTexture() override;
 

modules/video/include/videoplayer.h

@@ -76,7 +76,8 @@ public:
     virtual void decode(SyncBuffer* syncBuffer) override;
     virtual void postSync(bool isMaster) override;
 
-    documentation::Documentation Documentation();
+    static documentation::Documentation Documentation();
+
 private:
     // Libmpv keys
     enum class MpvKey : uint64_t {

modules/video/include/videotileprovider.h

@@ -56,6 +56,8 @@ public:
     Tile::Status tileStatus(const TileIndex& tileIndex) override final;
     TileDepthTransform depthTransform() override final;
 
+    static documentation::Documentation Documentation();
+
 private:
     void internalInitialize() override final;
     void internalDeinitialize() override final;