feat(win/video): support native YUV 4:4:4 encoding (#2533)

src/nvenc/nvenc_encoded_frame.h

@@ -1,6 +1,6 @@
 /**
  * @file src/nvenc/nvenc_encoded_frame.h
- * @brief Declarations for base NVENC encoded frame.
+ * @brief Declarations for NVENC encoded frame.
  */
 #pragma once
 
@@ -8,10 +8,15 @@
 #include <vector>
 
 namespace nvenc {
+
+  /**
+   * @brief Encoded frame.
+   */
   struct nvenc_encoded_frame {
     std::vector<uint8_t> data;
     uint64_t frame_index = 0;
     bool idr = false;
     bool after_ref_frame_invalidation = false;
   };
+
 }  // namespace nvenc