In our busy lives, having to attend a training at 5pm, after a long day's work, needing to do other things like.....
pick up children
do homework
run errands
exercise
relax
...does not encourage people to want to participate in professional development. Alternatively attending a training during the school day is not feasible since people need to be at school. Principals, assistant principals, department chairs, curriculum specialists, etc., all need to be at their school site.......inspectiing what they expect. Having an alternative method delivery, like a podcast, would afford people the opportunity to increase their knowledge in areas that would benefit their work. Although watching a video is non-interactive, it does provide a learning opportunity. How beneficial it is remains to be seen.