Stopwatch or using timer of other program

Hello,

I am trying to set something up to transcribe video files for my research. I need to do this to the nearest second. I am now trying to either create a function that enables me to have a row were I, if I for instance press enter, get the time of the counter. Since I have lots of video's to analyse and I would like to enter them in same sheet I need to be able to reset timer after viewing a video as well. A pause function would be great as well.
An other option would be if I could use the time from the program I will be using to play the videofiles, eg. Quicktime.

Thanks a lot in advance

David Jansen
PhD student in animal communication