Add all presentations and YouTube videos to the end of the README file.

[Mohammad A. Nili]

Hi,
I think it would be a good idea to add and update all presentations/videos about the SERV to the end of the README file so people can have a link to all of them in case they need.

[Olof Kindgren]

This is done now. Added a link to https://www.award-winning.me/videos/ where all SERV videos can be found.