I've seen some people creating videos, I don't know, like Super Mario Bros. Z (http://www.youtube.com/watch?v=1MpdxkdnV1A) or Bowser Kingdom (http://www.youtube.com/watch?v=a7q8DrnxySs)

I want to make that kind fo videos, so if anyone knows how to create them, I would really appreciate if you could tell me

Thanks!