Below is an except from a Harvard News article. This article sumamrizes a recent research study on the use of video as a learning tool for teachers and administrators.
Over three years, the Best Foot Forward project researchers, led by Professor Thomas Kane, surveyed hundreds of teachers and administrators and thousands of students on the use of video in the classroom. One concern was that teachers would resist being filmed, but in fact, teachers who selected to videotape themselves found the process fairer and more useful overall. By filming themselves and choosing which lessons to share, they became collaborators in their own professional development.
Teachers were also able to submit videos to external peer coaches for formative purposes. This method of training has been used heavily in athletics for decades. Research findings from the study demonstrate that the use of video increased teachers’ willingness to open up their instruction to peers and other instructional experts, compared to teachers who were not randomly assigned to use video.