Update video documentation

doc/source/videos.rst

@@ -1,22 +1,20 @@
 IM Videos
 =========
 
-There are an Infrastructure Manager youtube channel with a set of videos with demos
+There are an Infrastructure Manager YouTube reproduction list with a set of videos with demos
 of the functionality of the platform.
 
-Currently there are tree videos available, but soon more videos will be uploaded:
+Currently there are two videos available, but soon more videos will be uploaded:
 
 The first one shows how to use the IM web interface to launch a Hadoop Cluster with a 
 single click in a OpenNebula on-premise cloud platform and in Amazon EC2.
 
-The second video shows a demo of how to create a cluster with a single click using the 
-IM web interface with the EC3 tool. It also shows how CLUES works to dinamically manage 
-the size of the cluster automatically.
-
-The third one shows how to use the IM web interface to access `EGI FedCloud <http://www.egi.eu/infrastructure/cloud/>`_
+The second one shows how to use the IM web interface to access `EGI FedCloud <http://www.egi.eu/infrastructure/cloud/>`_
 sites using the OCCI plugin, showing also how to launch a Hadoop Cluster with a single click.
 
-`YouTube IM channel <https://www.youtube.com/channel/UCF16QmMHlRNtsC-0Cb2d8fg>`_
-
+`YouTube IM reproduction list <https://www.youtube.com/playlist?list=PLgPH186Qwh_37AMhEruhVKZSfoYpHkrUp>`_
 
+Moreover in the YouTube GRyCAP channel other interesting videos are available, as the 
+`EC3 tool <http://www.grycap.upv.es/ec3>`_ demos:
 
+`YouTube GRyCAP channel <https://www.youtube.com/channel/UCQD6RJBs57Giz4Xm8dhDczQ>`_