Dear Fatimah, here are some ideas below + refernces.
I would also recommend following authors and issues explored by Sarah Pink (visual ethnography) Marcus Banks (visual data in qualitative research), Robert Kozinets (netnography)
It will be call video content analyzer. You can try excalibur video analysis engine and tektronik cerify video content analysis software.
But you need to make the rule what kind of observation that you want to analyze, is it the motion, gesture, interaction (have to be detail and specific,e.g pasive or active by raising hand) or others.
Analysis of video recordings is an approach to archive the activities for a detailed observation and study. This can be helpful identifying various "missed to note" factors while carrying out a study. It is not possible to recover the details of talk through field observation alone, and if it is relevant to consider how people orient bodily, point to objects, grasp artifacts, and in other ways articulate an action or produce an activity its
unlikely that one could grasp little more than passing sense of what happened.