select tb_user_video_log.video_id, round(sum(if(timestampdiff(second,start_time,end_time)>=duration,1,0))/(count(tb_user_video_log.video_id)),3) as avg_comp_play_rate from tb_user_video_log join tb_video_info on tb_user_video_log.video_id=tb_video_info.video_id where year(start_time)=2021 group b...