Add video 'Diving deep into Briar'

content/page/press.md

@@ -77,6 +77,7 @@ Briar is occasionally mentioned in the press. This list is not comprehensive, bu
 
 
 ### Videos and Talks
+- 2021-10-15: [Diving deep into Briar](https://www.youtube.com/watch?v=sKuljekMzTc).
 - 2020-09-07: [Briar Messenger Review: As Private as It Gets](https://www.youtube.com/watch?v=WYjwEaTiIT0).
 - 2018-07-22: [Briar for Android](https://www.youtube.com/watch?v=SFqQhdstJDc).
 - 2017-12-30: [Briar - Resilient P2P Messaging for Everyone](https://media.ccc.de/v/34c3-8937-briar) at 34C3.