Pooya jan, you should definitely do it. The trick is to take very short clips (5-6 seconds). Then pick a good music and sync the cuts. It's really fun (p.s. I used Final Cut, which I found immensely user-friendly).
Iranpaak, good questions, and I'm afraid Pooya won't be too happy with my answer. I won't generalize at all, but our personal experience with spanish people was mixed. It was the worst in Madrid, where my wife had her wallet stolen from her bag the very first day [but as Pooya said, if you're careful with your belongings, pickpockets will never have a chance]. We also had a few instances of people trying to (or actually getting away with) over-charging us. But what surprised me the most was the generally poor attitude of people. I was expecting people to be a lot more friendly and welcoming. It's quite possible that we just got unlucky, but that was the way we saw it. I'm sure their hapless economic situation was a factor as well.
Our encounters with people got friendlier as we went more south (although we still had some bad experiences). We stayed in Seville and Malaga, and only took day-trips to Cordoba and Granada. The Moorish palace you see in the video between Mezquita and Alhambra is the Alcazar in Seville, which was one of my favorite places.
As for language, some people in our party spoke a bit of spanish. I would say the majority of people we encountered didn't speak any English (even people at the Airport security). Still, as long as you know a few basic words, you can always get by. (In contrast, we spent half a day in Lisbon, and even the unlikeliest people we encountered spoke decent English and seemed eager to do so).
