Add basic screencasts

README.md

@@ -14,14 +14,11 @@ Unlike the usual HTML-converted notebooks, each user connecting to the Voila
 tornado application gets a dedicated Jupyter kernel which can execute the
 callbacks to changes in Jupyter interactive widgets.
 
-- By default, voila disallows execute requests from the front-end, disabling
-  the ability to execute arbitrary code.
+- By default, voila disallows execute requests from the front-end, preventing
+  execution of arbitrary code.
 - By defaults, voila runs with the `strip_source` option, which strips out the
   input cells from the rendered notebook.
 
-When using these default settings, the code powering the Jupyter notebook is
-never sent to the front-end.
-
 ## Installation
 
 Voila can be installed with the conda package manager
@@ -66,12 +63,22 @@ jupyter serverextension enable voila --sys-prefix
 When running the notebook server, the voila app is accessible from the base url
 suffixed with `voila`.
 
-## Example
+## Examples
+
+The following two examples show how a standalone Jupyter notebook can be turned into a separate app, from the command-line integration.
+
+**Rendering a notebook including interactive widgets and rich mime-type rendering.**
+![voila basics](voila-basics.gif)
+
+**Rendering a notebook making use of a custom widget library ([bqplot](https://github.com/bloomberg/bqplot)).**
+
+![voila bqplot](voila-bqplot.gif)
+
+The sources of the Jupyter notebook can be displayed in a voila app if option `strip_sources` is set to `False`.
 
-The following screencast shows the voila-rendered version of notebook
-reproducing the "wealth of nation" data visualization with bqplot.
+**Showing the source code for a voila notebook.**
 
-![wealth of nations](voila-won.gif)
+![voila sources](voila-sources.gif)
 
 ## Related projects