Watch video, enter timing data in spreadsheet

I have a series of video files that run about an hour and a half combined. The video shows bicyclists at the start of a bike race. What I need is for someone to watch the video and very carefully note the time and race number of each cyclist that passes (each cyclist will have a race number mounted on his or her bike.) There will be four columns on the spreadsheet: Athlete number Hours Minutes Seconds For each athlete that passes the camera, record the athlete's number in the first column, then the number of hours, minutes and seconds into the video file when the athlete exits the frame (most will have hour = 0). There are almost 1600 athletes in the video files, which are .mp4 format. You can use any video player you would like; I have found GOM Player to be perfect for this job. I'll upload the video files to my server and give you the URL for each file, which you should download to your computer before beginning. Getting the timing correct is absolutely essential to this project. Final payment will be calculated on accuracy of your data file (we'll check 20 athletes' timing randomly - of these 20 randomly chosen athletes, if any are more than one second off, we'll reduce payment by 5%). That may sound difficult but if you've identified an athlete, getting his or her timing right to within one second is really easy.