Update screencasts.md

tweaks

docs/sources/guides/screencasts.md

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     <h3><strong>Episode 1</strong> - Building Graphite Queries</h3>
-    Learn how the Graphite query editor works, how to use different graphing functions and when use when to use certain graph display settings.
+    Learn how the Graphite Query Editor works, and how to use different graphing functions. There's also an introduction to graph display settings.
     <div class="video-container" style="margin-top:10px;">
     <iframe height="215" src="//www.youtube.com/embed/mgcJPREl3CU?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
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     <h3><strong>Episode 2</strong> - Templated Graphite Queries</h3>
-    The screencast focuses on templating in Graphite and how to make reusable and adaptable dashboards for various data sources and metrics.
+    The screencast focuses on Templating with the Graphite Data Source. Learn how to make dynamic and adaptable Dashboards for your Graphite metrics.
     <div class="video-container" style="margin-top:10px;">
     <iframe height="215" src="//www.youtube.com/embed/FhNUrueWwOk?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
     </div>
@@ -32,7 +32,7 @@ no_toc: true
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     <h3><strong>Episode 4</strong> - Installation & Configuration on Ubuntu / Debian</h3>
-    Shows how to easily install the dependcies and packages to get Grafana 2.0 up and running on Ubuntu or Debian in just a few mintues.
+    Learn how to easily install the dependencies and packages to get Grafana 2.0 up and running on Ubuntu or Debian in just a few mintues.
     <div class="video-container" style="margin-top:10px;">
     <iframe height="215" src="https://www.youtube.com/embed/JY22EBOR9hQ?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
     </div>
@@ -41,15 +41,15 @@ no_toc: true
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-    <h3><strong>Episode 5</strong> - Installation & Configuration on Redhat / Centos</h3>
-    This screencasts shows how to get Grafana 2.0 installed and configured quickly on RPM based Linux operating systems.
+    <h3><strong>Episode 5</strong> - Installation & Configuration on Red Hat / CentOS</h3>
+    This screencasts shows how to get Grafana 2.0 installed and configured quickly on RPM-based Linux operating systems.
     <div class="video-container" style="margin-top:10px;">
     <iframe height="215" src="https://www.youtube.com/embed/E-gMFv84FE8?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
     </div>
   </div>
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     <h3><strong>Episode 6</strong> - Adding data sources, users & organizations</h3>
-    Now that Grafana has been installed, learn about adding data sources and get a closer look at adding and managing users and organizations.
+    Now that Grafana has been installed, learn about adding data sources and get a closer look at adding and managing Users and Organizations.
     <div class="video-container" style="margin-top:10px;">
     <iframe height="215" src="https://www.youtube.com/embed/9ZCMVNxUf6s?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
     </div>
@@ -59,7 +59,7 @@ no_toc: true
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     <h3><strong>Episode 7</strong> - Beginners guide to building dashboards</h3>
-    For newer users of Grafana, this screencast will familiarize you with the general UI and teach you how to build your first dashboard.
+    For newer users of Grafana, this screencast will familiarize you with the general UI and teach you how to build your first Dashboard.
     <div class="video-container" style="margin-top:10px;">
     <iframe height="215" src="https://www.youtube.com/embed/sKNZMtoSHN4?list=PLDGkOdUX1Ujo3wHw9-z5Vo12YLqXRjzg2" frameborder="0" allowfullscreen></iframe>
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