Add new ReaR video, set all videos to privacy friendly embedding

.gitignore

@@ -1,2 +1,3 @@
 _site
-vendor
+vendor
+.jekyll-cache

index.md

@@ -3,7 +3,7 @@ layout: default
 title: Relax-and-Recover - Linux Disaster Recovery
 ---
 
-Relax-and-Recover is a setup-and-forget *Linux bare metal disaster recovery* solution.
+Relax-and-Recover (ReaR) is a setup-and-forget *Linux bare metal disaster recovery* solution.
 It is easy to set up and requires no maintenance so there is no excuse for not using it.
 
 Learn more about Relax-and-Recover from the selected usage scenarios below:
@@ -34,9 +34,17 @@ Learn more about Relax-and-Recover from the selected usage scenarios below:
 
 Or watch a 4-minute complete backup and restore demo. Real time, no cheating!
 
-<iframe width="720" height="400" src="//www.youtube.com/embed/33326XobwYg" ><p>Relax-and-Recover video</p></iframe>
+<iframe width="720" height="400" src="https://www.youtube-nocookie.com/embed/33326XobwYg?si=feOvXf8OlI9jvNEk" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen>
+    <a href="https://www.youtube.com/embed/33326XobwYg" target="_blank">Relax-and-Recover demo video</a>
+</iframe>
 
 Try Relax-and-Recover now. The [Quickstart guide](documentation/getting-started) takes only a few minutes!
 
 Your environment not supported? Relax-and-Recover is modular and easy to extend.
 It is GPL licensed and we welcome all feedback and contributions.
+
+To learn more about the Relax-and-Recover concepts, basic &amp; advanced usage and project history watch this 45-minute introduction by <a href="https://schlomo.schapiro.org/" target="_blank">Schlomo Schapiro</a>, project founder and maintainer:
+
+<iframe width="720" height="315" src="https://www.youtube-nocookie.com/embed/QN6vk5DfzAk?si=7_taajKAWkDvLTN5" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen>
+    Watch <a href="https://youtu.be/QN6vk5DfzAk" target="_blank">Relax and Recover (ReaR) - Automated Linux Recovery &amp; Open Source Project</a>
+</iframe>