PLEASE – Get to the point, stay on point and no dancing around the bush or beating it. The main point of your video should be made within the first couple of minutes, and the overall takeaway should be apparent throughout. and yes avoid making the video too long.
A series of 8-minute videos can be far more effective than one 80-minute video. Research shows that most people in educational settings have about a 10 to 15 minute maximum attention span before they get distracted.
In fact, a study by MIT found that, if you want to ensure people grasp every concept, the ideal length of a instructional or informative video is just 6 minutes . Based on this data, MIT worked with a group of educational institutions to offer short online courses, called mini-lectures, that were each less than 15 minutes long.
So if you have a lot of information to present, consider making a series of short videos. Give each video a separate theme and title, creating a steady stream of fresh videos for your audience to enjoy.