Avoid “Cognitive Overload”
Don’t present too much information at once.
Many of the suggestions below derive from an awareness of cognitive load theory. Media should avoid creating a state of “cognitive overload” in which too much information and visual stimuli are presented too rapidly. A guiding principle in the design of instructional videos is to focus on clarity and conciseness.
How to Speak
Remember, your audience is through the camera.
When recording, remember to speak through the camera to your students. Talk naturally, but articulately. A good example to follow for presentation style is this video by Daphney Wadley, PLNU faculty.
Ideal Length of Video
Keep videos around 4 minutes.
Research shows that students generally watch videos for an average of 4 minutes, so if you need a longer amount of time, consider breaking up your material into several shorter videos (Hibbert, 2014). The ideal time frame is between 2 and 5 minutes, after which studies show a significant drop off in views (Hsin & Cigas, 2013; Guo, Kim, & Rubin, 2014).
Work from a Script
It can provide structure, even if you want to go “off script.”
Even if you plan on speaking extemporaneously, it can help to write a script beforehand so that you have a structure planned for your presentation of the information. Scripts can cut down on anxiety for those who feel uncomfortable speaking impromptu. Working from a script can also give you a head start on closed captioning, discussed below.
*Excerpts from the Center for the Enhancement of Teaching and Learning, UC