Demo video in README and docs (#119)

Author: ibirothe

README.md

@@ -18,10 +18,6 @@ Available here!
 
 https://merrimanind.github.io/drawpyo/
 
-# Discord Server
-
-https://discord.gg/CSMHupUvRp
-
 # Basic Usage
 
 The basic mode of interacting with drawpyo is to manually create, style, and place objects just like you would using the Draw.io UI. There are a number of ways to style objects and you can write your own functionality for automatically handling style or placement.
@@ -72,19 +68,13 @@ file.write()
 
 Drawpyo also provides higher-level functionality that goes beyond what the Draw.io app offers. These **diagram types** allow you to generate complete structures automatically, without manually placing every element.
 
-Currently, Drawpyo supports:
+This video demonstrates an exemplary automatic diagram layout process:
 
-* **Tree Diagrams**
-* **Binary Tree Diagrams**
-* **Bar Charts**
-* **Pie Charts**
-* **Color Legends**
+[<img src="https://img.youtube.com/vi/HwUqUZZVMgQ/hqdefault.jpg" width="480" height="270"
+/>](https://www.youtube.com/embed/HwUqUZZVMgQ)
 
 For more details, refer to the [documentation](https://merrimanind.github.io/drawpyo/).
 
-Work has also begun on additional diagram types, including:
+## Contributions
 
-* Automatic class/object/inheritance diagrams from a Python module
-* Directed and undirected graphs from adjacency lists
-* Flowcharts
-* Process diagrams
+Contributions are welcome. See the [contribution guidelines](CONTRIBUTING.md) or join our [Discord server](https://discord.gg/CSMHupUvRp) for more information.

docs/about.md

@@ -14,6 +14,11 @@ See the full documentation for these functions in [Basic Diagrams - Usage](usage
 
 Drawpyo extends the basic functionality of the Draw.io app with custom diagram types. These custom diagrams have automated styling and layouting to make common or complex diagrams easier to generate.
 
+This video demonstrates an exemplary automatic diagram layout process:
+
+[<img src="https://img.youtube.com/vi/HwUqUZZVMgQ/hqdefault.jpg" width="480" height="270"
+/>](https://www.youtube.com/embed/HwUqUZZVMgQ)
+
 ## TreeDiagram
 
 This diagram makes creating directed tree graphs easy. Define trees, nodes, and then apply an auto layout.