Video or no Video?

Video is often called a "rich medium" because it delivers social cues like body language, tone, and facial expressions that are completely missing in text. In an online course, this helps students feel a sense of "social presence," allowing them to see their peers and instructors as real people.

However, adding too much video to an online course can actually cause problems for some learners, as research suggests. Overusing video can be counterproductive for several reasons:

• It hurts flexibility: Unlike text, video demands dedicated time and a quiet place, making it hard for students to study during commutes, quick breaks, or while multitasking. This loss of flexibility is a major drawback, especially for adult distance learners.

• It can feel like busywork: If a course already involves a lot of multimedia creation, constant video consumption can feel like unnecessary extra work. Text is often more efficient for simple, straightforward instructions. Video is best reserved for tasks that require multiple interpretations or complex demonstrations.

• It raises privacy concerns: Requiring students to record themselves can cause discomfort. Video reveals personal details like appearance, voice, and even a glimpse into their home environment things many students prefer to keep private.

• It slows down processing: While video effectively boosts the instructor's presence, it is inherently slower to process than text and doesn't automatically improve the feeling of community among students.

Ultimately, educators must find a balance between the benefits of technology and the risk of losing the flexibility that many distance learners need.

Educational video design must also follow principles laid out by cognitive scientist Richard Mayer, who warns against common design mistakes:

1. Mayer's research shows that multimedia principles primarily benefit learners who are new to a subject (low knowledge learners). Experts, who already have strong mental frameworks, can be hindered by redundant visuals or elaborate graphics. They often learn more efficiently from simple text, as they can generate their own mental images.

2. A major design flaw is presenting on screen text that exactly matches the spoken narration. When learners try to process identical information through both their visual (reading) and auditory (listening) channels simultaneously, it creates a "bottleneck." This wastes valuable cognitive resources that should be used for integrating the new information. Learners benefit more from a combination of graphics and narration.

3. Adding "interesting" but irrelevant elements like unnecessary background music, unrelated animations, or tangential videos is discouraged. These "seductive details" divert a learner’s limited attention away from the core lesson, making it harder for them to build a coherent mental model of the material. Mayer advocates for "weeding out" any media that doesn't directly support the learning objective.

4. Learning is much less effective when video is presented as one long, continuous clip. Mayer found that students perform better when they can control the pace using "pause," "rewind," or "next" buttons. A video that flows too quickly prevents the learner from having enough time to organize and integrate the new information.

While Mayer’s Redundancy Principle generally advises against duplicating speech with on screen text, he acknowledges important exceptions for instance, for learners with certain disabilities or those with very little prior knowledge of the topic. Therefore, educators can integrate videos as supplementary, skippable resources. This allows learners who benefit from rich media to use them, while ensuring that those who prefer text or don't need the extra help aren't slowed down or overwhelmed.

The infographic below summarizes my thoughts from this blog post