Changed the hard coded value of width of the youtube video to the string 'auto' fo fix issue #244

Author: moisedk

pretext/Selection/Logicaloperators.ptx

@@ -222,7 +222,7 @@ print(n % 2 == 0 or n % 3 == 0)
     </tabular>
   </table>
   <p>Also, Google has provided this short video showing different logical operators:</p>
-  <video xml:id="GoogleLogic" youtube="57dPVbnRouU" width="667"/>
+  <video xml:id="GoogleLogic" youtube="57dPVbnRouU" width="auto"/>
   <p>In the video, each letter is representative of a logical operater and only shows its color when the
             corresponding <term>x</term> or <term>y</term> is showing in the second <term>G</term>. If you take a look at xor, you will notice
             it is only colorful when either <term>x</term> or <term>y</term> is showing, but not both. This is called <c>exclusive or</c>,