Document KEP-5116

Author: serathius

content/en/docs/reference/using-api/api-concepts.md

@@ -127,7 +127,7 @@ virtual resource type would be used if that becomes necessary.
 
 ## HTTP media types {#alternate-representations-of-resources}
 
-Over HTTP, Kubernetes supports JSON and Protobuf wire encodings.
+Over HTTP, Kubernetes supports JSON, YAML, CBOR and Protobuf wire encodings.
 
 By default, Kubernetes returns objects in [JSON serialization](#json-encoding), using the
 `application/json` media type. Although JSON is the default, clients may request a response in
@@ -144,6 +144,12 @@ If you request an available media type, the API server returns a response with a
 a `406 Not acceptable` error message.
 All built-in resource types support the `application/json` media type.
 
+#### Streamed response writing
+
+For JSON and Protobuf encoding Kubernetes supports streaming while writing response.
+The feature doesn't impact the output of the response,
+but has a huge performance impact on API server performance by avoiding loading whole large responses into memory.
+
 ### JSON resource encoding {#json-encoding}
 
 The Kubernetes API defaults to using [JSON](https://www.json.org/json-en.html) for encoding