Is it possible to include video audience retention graph on facebook and youtube? This will tell us how many viewers there are at each time period of the video
Facebook retention graph is at "post_video_retention_graph"
https://developers.facebook.com/docs/graph-api/reference/v7.0/insights
Youtube retention graph is at "elapsed_video_time_percentage"
https://developers.google.com/youtube/reporting/v1/reports/metrics