Impressions on video 1

How does the video portray the image of power?
 That changing some words can make the power of the message be much more than other that mean the same.
What are the main differences between the text in the first sign and in the second one?
  The first on didn't make effect on the public while the second called the attention of the public.
What was the people´s reaction to the first sign like?
 People just passed by ignoring the old man.
What was the people´s s reaction to the second sign?
 People payed the old man.
Does the video effectively reflect the power of words?
 Yes.