usage of etoc package to handle multiple TOCs, for example one short and one detailed mutually referencing one another

twoetocs.tex

% we use etoc concept of depthtags
% here, it could be simplified but I added some complete
% mark-up in case the location of the TOCs are moved.
% of course, this can be extended easily to >2 TOCs
% with complex rules of listing or not one another
% jfbu Mardi 29 octobre 2019 à 21:38:25

\documentclass{memoir}

\pagestyle{plain}
\chapterstyle{default}

\setsecnumdepth{subsection}

\usepackage{hyperref}

% TOC STUFF
\usepackage{etoc}

\AtBeginDocument{\addtocontents{toc}{\protect\hypersetup{hidelinks}}}

\etocsettagdepth{AfterShort}{all}
\etocsettagdepth{AfterDetailed}{all}

\begin{document}

\frontmatter

\etocsettocdepth{1}
\etocsettagdepth{Short}{none}
\etocsettagdepth{Detailed}{all}

\renewcommand{\contentsname}{Short Contents}

\etocdepthtag.toc{Short}
\tableofcontents
\etocdepthtag.toc{AfterShort}

\clearpage

\etocsettocdepth{2}
\etocsettagdepth{Short}{all}
\etocsettagdepth{Detailed}{none}

\renewcommand{\contentsname}{Detailed Contents}

\etocdepthtag.toc{Detailed}
\tableofcontents
\etocdepthtag.toc{AfterDetailed}

\clearpage

\mainmatter

\newcommand\Sample{
  \chapter{Chap}This is a chapter.
  \section{Sec}This is a section.
  \subsection{Subsec}This is a subsection.
}
\Sample\Sample

\end{document}