I have been an on-line instructor for American Military University since 2009. My students are not simple to categorize except they are mostly either serving or former military or individuals seeking to break into the intelligence community as a career.AMU and its parent, APUS, offer asymmetrical courses. This means the students and the instructors are not on-line at the same time. The materials started out like traditional, brick and mortar schools importance they were a amalgamation of documents and books.Video is generally considered a way to make the ‘classroom’ more inviting. I fact, when I developed a course for AMU free “Cyber & The Intelligence Cycle”, my supervising Faculty Director told me I had to provide 20 minutes of ‘entertainment’ for the students. If you’re interested, let me know and I’ll send you a like to one of the PPT lectures that I recorded with my voiceover.Apparently the use of videos in on-line education is an global trend. While researching for this week’s Blog post www.psyopwar.com I saw some information in this area Wilaya Ninwa, the propaganda arm of ISIS. In rummaging around the Internet I came across a new source (see: http://bit.ly/2qt4rIv, which is also the photo source). The reference to the trigonometric formula that the tangent = the opposite/the adjacent was not lost on me and indicates a unique analytical perspective.They featured a 35 minute video amongst others. The referenced link offers some analysis of the video as well as some clips.I was struck, not by the fact that they were using videos, but the length. Given the probable target demographic I was quite surprised that the video is over 10 minutes long. Perhaps this because the video is meant to be a recruiting tool or a subliminal persuader and not a being a training vehicle.As I learn more in this area video, it appears that 10 minutes is the sweet spot. I’d be very interested in learning what readers have to say on the subject.