\documentclass{beamer}

\usepackage[sec,subsec]{projektor}

\title[TITLE]{TITLE OF PRESENTATION}
\author{\href{mailto:place@holder.com}{YOU} | INFOS}
\institute{SUBJECT $\cdot$ LOCATION}
\date{}


\begin{document}
\maketitle

\section[FIRST SECTION]{SECTION} % title and subtitle reversed
\begin{frame}[t]{TITLE} % [t] start text at top
  Hello, world!
\end{frame}

\begin{frame}{SECOND TITLE}
  \begin{columns}
    % Left
    \column{\dimexpr\linewidth-30mm-5mm}
    Those who do not learn history are doomed to repeat it.

    % Right
    \column{30mm}
    \begin{figure}
      \includegraphics[width=30mm]{example-image-a}
      \caption*{Image A}
    \end{figure}
  \end{columns}
\end{frame}

\begin{frame}[plain,noframenumbering]
  \begin{center}
    \Large\textbf{Bye, world.}
  \end{center}
\end{frame}


\appendix
\begin{frame}{Sources}
  \begin{itemize}\begin{multicols}{2}
      \item \href{https://fr.wikipedia.org/}{\nolinkurl{wikipedia.org}}
    \end{multicols}\end{itemize}
\end{frame}

\end{document}
