Replace san diego video with munich : better quality (conan-io#2101)

Author: solvingj

videos.rst

@@ -19,7 +19,7 @@ Videos and links
 
   .. raw:: html
 
-      <iframe width="560" height="315" src="https://www.youtube.com/embed/nw4Is5ekLNo" frameborder="0" allow="autoplay; encrypted-media; allowfullscreen>
+      <iframe width="560" height="315" src="https://www.youtube.com/embed/TXXT9XZ-vok" frameborder="0" allow="autoplay; encrypted-media; allowfullscreen>
       </iframe>
 
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