doc: Add a short intro video

This video covers the basics in a short time, so add a link to it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/doc/learn/talks.rst b/doc/learn/talks.rst
index 0bb44ae..d65e3b9 100644
--- a/doc/learn/talks.rst
+++ b/doc/learn/talks.rst
@@ -15,6 +15,9 @@
   <https://www.youtube.com/watch?v=YlJBsVZJkDI>`__
   from Embedded Linux Conference 2023.
 
+* `Introduction to U-Boot for beginners
+  <https://www.youtube.com/watch?v=rVaiLgXccSE>`__
+
 See elinux_talks_ for a more comprehensive list.
 
 .. _elinux_talks: https://elinux.org/Boot_Loaders#U-Boot