To cite e-mails, list them parenthetically in-text:
The web site's navigation posed significant usability
problems for study participants (A. B. Jones
[imaginarysender@uafs.edu], e-mail, June 28, 2013).
Follow a similar format for other personal communications (e.g. interviews):
According to study participant A. B. Jones (written
communication, June 2013)...
According to study participant A .B. Jones (oral
communication, June 2013)...
To cite a YouTube video:
Author AA (or if unknown, video title). Video title
(if not already named) [Video]. Publication date.
Access date.
How to Perform the Heimlich Maneuver (Abdominal
Thrusts) [Video]. YouTube. Available at: http://
www.youtube.com/watch?v=tEIiEAn7b-U.
Published May 27, 2009. Accessed July 9, 2013.