All paraphrased or quoted text, borrowed ideas, images, videos etc must be cited.
Here is the format for citing YouTUBE videos:
With YouTube videos, it is important to distinguish between the creator of the content and the person who posted the content. If the creator of the video is credited, put their name in the author position (Creator). Next include the name or screen name of the person who posted the video (Poster), followed by the date posted, the title, and the URL. If no creator is listed, put the poster in the first spot.
Has a creator:
Takayma-Ogawa, J., & Willette, J (Creators). OtisCollege (Poster) (2007, March 14). What is information literacy [Video] Retrieved from http://www.youtube.com/watch?v=yeopJX5jJV8.
Has only a poster:
darkinsidious (Poster). Slingshot fun [Video]. (2007, January 29). Retrieved from http://www.youtube.com/watch?v=CCmZYce0J2E.
This information came from a very useful site found by Christy Payton, one of our own TLED 301 students from Summer 2011: http://www.library.illinois.edu/learn/tutorials/apa.html