Add new build a bookmark tool screencast

Author: distantnative

content/docs/3_reference/3_panel/1_blueprints/0_page/reference-article.txt

@@ -136,6 +136,8 @@ The button label changes depending on the status option set:
 
 (image: page-creation-status.png)
 
+(screencast: https://youtu.be/rC9Up05WVnI title: Page creation dialog text: An example how to customize the page creation dialog for building a bookmark tool.)
+</since>
 <since v="4.1.0">
 ### Automatic title and slug
 

content/docs/3_reference/3_panel/4_sections/0_pages/reference-panelsection.txt

@@ -576,3 +576,5 @@ sections:
     type: pages
     search: true
 ```
+
+(screencast: https://youtu.be/rC9Up05WVnI title: Build a bookmark tool text: An example how to build a nice overview with the table layout in the pages section showing all relevant columns.)