add videos section; fix #770 (#772)

* add videos section; fix #770

* better formatting

docs/tex/tutorials/index.tex

@@ -50,6 +50,39 @@ \subsection{Tutorials}
 
 If you're interested in contributing a tutorial, checking out the
 \href{/contributing}{contributing page}.
+
+\subsubsection{Videos}
+
+\begin{itemize}
+  \item
+  \href{https://www.youtube.com/watch?list=PLpTp0l_CVmgwyAthrUmmdIFiunV1VvicM&v=1zNNLHyeWok}
+  {Probabilistic Programming with GPs}
+  by Dustin Tran. Gaussian Process Summer School, 09/2017.
+  \item
+  \href{https://youtu.be/fR5Wvb86-IU}
+  {Intro to Bayesian Machine Learning with PyMC3 and Edward}
+  by Torsten Scholak, Diego Maniloff. PyCon, 05/2017.
+  \item
+  \href{https://www.youtube.com/watch?v=I09QVNrUS3Q}
+  {Bayesian Deep Learning with Edward (and a trick using Dropout)}
+  by Andrew Rowan. PyData London, 05/2017.
+  \item
+  \href{http://bit.ly/2k9QM3J}
+  {Edward: A library for probabilistic modeling, inference, and
+  criticism}
+  by Dustin Tran. NYU ML Meetup, 01/2017.
+  \item
+  \href{https://www.pscp.tv/hugo_larochelle/1yNGanvpOPjJj}
+  {Edward: A library for probabilistic modeling, inference, and criticism}
+  by Dustin Tran. Twitter, 09/2016.
+\end{itemize}
+
+We also have a
+\href{https://github.com/edwardlib/papers}{community repository}
+for sharing content such as papers, posters, and slides.
+
+\subsubsection{Background}
+
 For more background and notation, see the pages below.
 \begin{itemize}
   \item \href{model}{Probabilistic models}