How to blur a face in the crowd.
I just got a request from a student from School of Education SOE). She has an issue, which pops up rather frequently with pre-service teachers from SOE. When she videotapes in the classroom, she is supposed to obtain permission for the video recording. In her case, one of the student wanted to be blurred out.
Here is a short YouTube video, which guides you through the iMovie process. The same is for Final Cut Pro:
also helpful hints here: https://sites.google.com/site/karstenschluter/imovie09tricks