Made (even) more clear tutorial thread is advanced

examples/tutorial_api_thread/1_thread_user_processing_function.cpp

 // ------------------------- OpenPose Library Tutorial - Thread - Example 1 - User Processing Function -------------------------
-// This fourth example shows the user how to:
-    // 1. Read folder of images / video / webcam  (`producer` module)
-    // 2. Use the processing implemented by the user
-    // 3. Display the rendered pose (`gui` module)
-    // Everything in a multi-thread scenario (`thread` module)
-// In addition to the previous OpenPose modules, we also need to use:
-    // 1. `core` module: for the Datum struct that the `thread` module sends between the queues
-    // 2. `utilities` module: for the error & logging functions, i.e., op::error & op::log respectively
+// This directory only provides examples for the basic OpenPose thread mechanism API, and it is only meant for people
+// interested in the multi-thread architecture without been interested in the OpenPose pose estimation algorithm.
+// You are most probably looking for the [examples/tutorial_api_cpp/](../tutorial_api_cpp/) or
+// [examples/tutorial_api_python/](../tutorial_api_python/), which provide examples of the thread API already applied
+// to body pose estimation.
 
 // Third-party dependencies
 #include <opencv2/opencv.hpp>

examples/tutorial_api_thread/2_thread_user_input_processing_output_and_datum.cpp

 // ------------------------- OpenPose Library Tutorial - Thread - Example 2 - User Input Processing And Output -------------------------
-// This fourth example shows the user how to:
-    // 1. Read folder of images / video / webcam  (`producer` module)
-    // 2. Use the processing implemented by the user
-    // 3. Display the rendered pose (`gui` module)
-    // Everything in a multi-thread scenario (`thread` module)
-// In addition to the previous OpenPose modules, we also need to use:
-    // 1. `core` module: for the Datum struct that the `thread` module sends between the queues
-    // 2. `utilities` module: for the error & logging functions, i.e., op::error & op::log respectively
+// This directory only provides examples for the basic OpenPose thread mechanism API, and it is only meant for people
+// interested in the multi-thread architecture without been interested in the OpenPose pose estimation algorithm.
+// You are most probably looking for the [examples/tutorial_api_cpp/](../tutorial_api_cpp/) or
+// [examples/tutorial_api_python/](../tutorial_api_python/), which provide examples of the thread API already applied
+// to body pose estimation.
 
 // Third-party dependencies
 #include <opencv2/opencv.hpp>

examples/tutorial_api_thread/README.md

 # Thread API Examples
-**NOTE**: This is an advanced API, you are most probably looking for the [examples/tutorial_api_python/](../tutorial_api_python/) examples folder, which provides examples of the thread API but applied to body pose estimation.
+**NOTE**: This directory only provides examples for the basic OpenPose thread mechanism API, and it is only meant for people interested in the multi-thread architecture without been interested in the OpenPose pose estimation algorithm.
 
-This folder provides examples to the basic OpenPose thread mechanism API. It is only meant for people interesed in the multi-thread architecture without been interesed in the OpenPose pose estimation algorithm.
+You are most probably looking for the [examples/tutorial_api_cpp/](../tutorial_api_cpp/) or [examples/tutorial_api_python/](../tutorial_api_python/), which provide examples of the thread API already applied to body pose estimation.