Too many people consider secession bad, and do not understand the original right of independence. Here is a YouTube in Spanish with English sub-titles is relevant to Groeland, Scotland, Quebec, and Catalunya.
This documentar [y directed by Dolors Genovès and broadcasted by Televisió de Catalunya compares the reality of Greenland, Scotland and Quebec with Catalonia, and reflects about the following questions: Is independence/secession democratic? Would these new states be economically viable? How would EU react?
English subtitles. More information : http://www.tv3.cat/adeuespanya