The following training videos were generated during the year 2016 and published first on YouTube. However, Tobias decided to commercialize these videos because the community did not support his work. During the last few years, especially in 2019, Tobias' opinion about different things in life changed drastically related to his initiated stroke of fate. Hence, Tobias decided to re-publish the videos for free. However, as the wording »archived« states, these videos are related to an older OpenFOAM® version. As OpenFOAM® is a huge c++ library, these videos are still valid except that class names or functions might not be valid anymore. Nevertheless, the videos will give you fundamental knowledge about OpenFOAM® (c++) programming, the class hierarchy, how to use Doxygen, navigate through the project directory tree, and using the GNU debugger named GDB.