A large part of the exploration of exoplanets ohas to do with the search for extraterrestrial intelligence as you have seen. Here is another video that examines this phenomenon from a different angle:
Scientists are on the verge of answering one of the greatest questions in history: Are we alone? Finding Life Beyond Earth immerses audiences in the sights and sounds of alien worlds, while top astrobiologists explain how these places are changing how we think about the potential for life in our solar system.
Will we ever find aliens or maybe they have found us?
Feel free to comment with your ideas on this matter. There are a lot of different techniques being examined including the restarting of the S.E.T.I. program.