Merge pull request #12828 from keymanapp/showcase-video

docs(developer,mac): add playable video links to the help documentation

developer/docs/help/guides/intro.md

@@ -12,8 +12,9 @@ Linux.
 There are two core applications included in Keyman Developer: the Keyman
 Developer IDE (formerly called TIKE), and the command line compiler kmc.
 
-[Watch a video](https://youtu.be/kwhgx_eX4Es) that highlights some of
-the Keyman Developer features.
+Watch a video that highlights some of the Keyman Developer 14.0 features (57:23)
+
+:<img class="video-thumbnail" data-video="https://www.youtube.com/embed/kwhgx_eX4Es" src="https://img.youtube.com/vi/kwhgx_eX4Es/maxresdefault.jpg" width="600px" alt="Keyman Developer 14.0 Webinar">
 
 ## Keyman Developer IDE
 

mac/docs/help/start/install-keyboard.md

@@ -8,7 +8,9 @@ You must have a Keyman keyboard installed to type with Keyman for macOS in your
 
 Here's how to download and install a Keyman keyboard within Keyman for macOS:
 
-[![](../mac_images/video.png) Watch Video](https://youtu.be/VirHygx8iqg) for installing the Khmer Angkor keyboard for Keyman for macOS.
+![](../mac_images/video.png) Watch this video for installing the Khmer Angkor keyboard for Keyman for macOS (0:51)
+
+:<img class="video-thumbnail" data-video="https://www.youtube.com/embed/VirHygx8iqg" src="https://img.youtube.com/vi/VirHygx8iqg/maxresdefault.jpg" width="600px" alt="Tutorial: Install Khmer Angkor Keyboard on Keyman for macOS">
 
 1. Choose Keyman from the Input menu in the menu bar.
 2. Open Keyman Configuration, from the Configuration link under Keyman in the Input menu.

mac/docs/help/start/install-keyman.md

@@ -5,7 +5,9 @@ title: Install Keyman for macOS
 *Keyman for macOS* is available for [download](https://keyman.com/mac/download) as a standard
 Apple Disk Image (.dmg) file. It should be installed according to the following instructions.
 
-[![Play](../mac_images/video.png) Watch Video](https://youtu.be/7Ax71QeUNfo)
+![Play](../mac_images/video.png) Watch Video (0:33)
+
+:<img class="video-thumbnail" data-video="https://www.youtube.com/embed/7Ax71QeUNfo" src="https://img.youtube.com/vi/7Ax71QeUNfo/maxresdefault.jpg" width="600px" alt="Tutorial: Install Keyman for macOS">
 
 1. Double click the DMG file to open it in Finder.
 2. Double click the **Install Keyman** icon to open the Keyman installer.