add utube link

Gemfile

@@ -19,6 +19,7 @@ gem "rubyx-debugger" , "0.3" , git: "https://github.com/ruby-x/rubyx-debugger" ,
 gem "rx-file" , git: "https://github.com/ruby-x/rx-file"
 
 gem "haml-coderay"
+gem 'mini_racer'
 
 group :development, :test do
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]

Gemfile.lock

@@ -134,6 +134,7 @@ GEM
       thor (>= 0.14, < 2.0)
     launchy (2.4.3)
       addressable (~> 2.3)
+    libv8 (7.3.492.27.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -149,6 +150,8 @@ GEM
     mimemagic (0.3.3)
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
+    mini_racer (0.2.6)
+      libv8 (>= 6.9.411)
     minitest (5.11.3)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
@@ -300,6 +303,7 @@ DEPENDENCIES
   haml-rails
   high_voltage
   listen (>= 3.0.5, < 3.2)
+  mini_racer
   opal (~> 0.11.0)
   opal-browser (= 0.2.0)
   opal-jquery
@@ -318,4 +322,4 @@ DEPENDENCIES
   web-console (>= 3.3.0)
 
 BUNDLED WITH
-   1.17.2
+   2.0.1

app/views/pages/index.html.haml

@@ -86,8 +86,10 @@
       menu.
     %p
       A
-      = ext_link "short talk" , "/rubyx_goa_2019.pdf"
-      i held at rubyconf india 2019. Only pdf, while we wait for the video.
+      = ext_link "short talk" , "/rubyx_hamburg_2019.pdf"
+      i held at rubyconf india 2019 and unconf hamburg.
+      A video was made in hamburg and can be found
+      = ext_link "on youtube" , "https://youtu.be/ojW-q_wiSn8"
     %p
       To get to know the system, there is also an interpreter and a basic
       =succeed "." do