For a few years now I’ve been spouting the same lines when it comes to planning a video for an distance learning course or MOOC: “preferably no more than 4 minutes, definitely no more than 6.” Anything more than 6 and we’d consider splitting it at a natural point in the subject, or working with the individual and their content and seeing where a natural break can be made, or other ways to shorten the video.
This has been supported by experience (from distance learning courses I’ve supported at both Bournemouth and Leicester University’s) and the MOOCs I’ve supported and developed while at Warwick, as well as articles like this.
As with everything, there is enough evidence to be found to support and to disprove it.
Yes, I agree that if you have a ‘teaching’ resource, where the academic/teacher is speaking to camera then there is an optimum length that someone will sit and be ‘talked at’, and this is where I see the 6 minute limit coming into play. These kinds of resources are often loaded to a VLE or a MOOC and as part of a set of resources for the topic or week’s subject area.
But there are other approaches to video content where I don’t see this working. What about case studies or mini-documentaries? What about a conversation, when a short 4 minute clip just isn’t enough to get in to the details? Do you still stick to the short-is-best message? In order for these to work you will often need to make it longer so the content and ‘message’ of the case study can be put across.
Let’s not forget, the video is nothing on it’s own. It must always be put into context for the student – why are you presenting the video for them to watch, what do you expect them to think about when they watch it, is there something they need to question as a result of the video (and/or linking it to other resources to build their wider knowledge about the subject area), can they critique the resource and present their findings back to the group, etc.?