How to customize title page in beamer so that it looks like

Question

How can I modify title page so that it looks like it is in this video. Please seek to 16 seconds and watch title page. I do not have permission to post images. I liked this theme and I want to make a beamer theme that looks similar. I tried with beamercolorbox but I failed to position the box to the bottom.

---

Edit: Here is my minimum working example

\documentclass[xcolor=dvipsnames]{beamer}
\defbeamertemplate*{title page}{customized}[1][]
{
\usebeamerfont{subtitle}
\usebeamercolor[fg]{subtitle}

{\flushright
\setbeamercolor{author}{bg=white,fg=Red}
\usebeamerfont{author} \insertauthor\par
\usebeamerfont{institute}\insertinstitute\par }

\vspace{0.2in}

\setbeamercolor{postit}{fg=white,bg=YellowOrange}

\begin{beamercolorbox}[sep=1em,wd=1.062\textwidth,ht=3cm,dp=3cm,right]{postit}
\usebeamerfont{title} {\huge \inserttitle}\par
\usebeamerfont{subtitle} {\insertsubtitle}
\end{beamercolorbox}
}
\usecolortheme[named=YellowOrange]{structure}
\useoutertheme{infolines}
\setbeamertemplate{navigation symbols}{} 
\institute{Harvard College Professor and\\ Johnstone Family Professor in Psychology, Harvard University}

\title{SAY WHAT?}
\subtitle{Linguistics as a Window to\\ Understanding the Brain}
\author{Steven Pinker}

\begin{document}
{
\setbeamertemplate{footline}{}
\begin{frame}
\titlepage
\end{frame}
}
\end{document}

Answer 1

Here's one possibility; I redefined the title page template and used TikZ's \nodes to place the elements; pdfrender was used for the author and the title:

\documentclass{beamer}
\usepackage{tikz}
\usepackage{pdfrender}

\usetikzlibrary{shapes,arrows}
\setbeamerfont{author}{size=\Huge}
\setbeamerfont{institute}{size=\normalsize\itshape}
\setbeamerfont{title}{size=\fontsize{30}{36}\bfseries}
\setbeamerfont{subtitle}{size=\Large\normalfont\slshape}

\setbeamertemplate{title page}{%
\begin{tikzpicture}[remember picture,overlay]
\fill[orange]
  ([yshift=15pt]current page.west) rectangle (current page.south east);
\node[anchor=east] 
  at ([yshift=-50pt]current page.north east) (author)
  {\parbox[t]{.6\paperwidth}{\raggedleft%
    \usebeamerfont{author}\textcolor{orange}{%
    \textpdfrender{
    TextRenderingMode=FillStroke,
    FillColor=orange,
    LineWidth=.1ex,
    }{\insertauthor}}}};
\node[anchor=north east] 
  at ([yshift=-70pt]current page.north east) (institute)
  {\parbox[t]{.78\paperwidth}{\raggedleft%
    \usebeamerfont{institute}\textcolor{gray}{\insertinstitute}}};
\node[anchor=south west] 
  at ([yshift=20pt]current page.west) (logo)
  {\parbox[t]{.19\paperwidth}{\raggedleft%
    \usebeamercolor[fg]{titlegraphic}\inserttitlegraphic}};
\node[anchor=east]
  at ([yshift=-10pt,xshift=-20pt]current page.east) (title)
  {\parbox[t]{\textwidth}{\raggedleft%
 \usebeamerfont{author}\textcolor{white}{%
    \textpdfrender{
    TextRenderingMode=FillStroke,
    FillColor=white,
    LineWidth=.1ex,
    }{\inserttitle}}}};
\node[anchor=east]
  at ([yshift=-60pt,xshift=-20pt]current page.east) (subtitle)
  {\parbox[t]{.6\paperwidth}{\raggedleft\usebeamerfont{subtitle}\textcolor{black}{\insertsubtitle}}};
\end{tikzpicture}
}

\author{John Doe}
\institute{Harvard College Professor and\\ Johnstone Family Professor in Psychology, Harvard University}
\title{Say What?}
\subtitle{Linguistics as a Window for Understanding the Brain}
\titlegraphic{\includegraphics[width=2cm]{ctanlion}}

\begin{document}

\begin{frame}
\maketitle
\end{frame}

\end{document}

CTAN lion drawing by Duane Bibby.

Feel free to adjust the lengths according to your needs.