\documentclass{article}
\usepackage{verbatim}
\newenvironment{myverbatim}{%
before \verbatim inside}{%
inside \endverbatim after}

\begin{document}
\section{verbatim}
Before
\begin{verbatim}
Inside
\amacro
More Inside
\end{verbatim}
After

Before \begin{verbatim} Inside1
Inside2
Inside3 \end{verbatim} [ignored after]

Before \begin{verbatim} Inside1
Inside2
% comment Inside \end{verbatim}


Before \begin{verbatim} Inside1
Inside2
\end {verbatim}

\section{comment}
Before
\begin{comment}
Inside
\end{comment}
After

Before
\begin{comment}
Inside
\end {comment}
After

Before \begin{comment}Inside1
Inside2
Inside3 \end{comment} [ignored after]
After

\section{myverbatim}
Before
\begin{myverbatim}
Inside
\end{myverbatim}
After

Before \begin{myverbatim}Inside1
Inside2
Inside3 \end{myverbatim} [ignored after]
After

\section{Defining}
%\newverbtext{\silly}"^%{ &~_\}}@ #"

%\section{Weird \silly}

\section{From File}
\verbatiminput{verbata.tex}

\end{document}