Air Force Drill (Marching)
I looked for some good videos on marching but I did not find many I wanted to necessarily endorse. On my limited search I found a video of some JROTC cadets marching who looked really sharp. Off the top of my head this video covers 95% of what you will need to know how to do by the time you graduate OTS (with the exception of parade.) The only one we did all the time which was not in the video was column of files from the right/left.