use official link

data/links.yml

@@ -133,7 +133,7 @@
   type: av
   date: 2019-07
   links:
-    - href: https://download.fsfe.org/presentations/20190703-mm-SALT-ITSec.en.mp4
+    - href: https://passthesalt.ubicast.tv/videos/no-it-security-without-free-software/
       text: Talk @ Pass the SALT
     - href: https://download.fsfe.org/presentations/20190703-mm-SALT-ITSec.en.pdf
       text: Slides