How to use MediaLab for Online Studies?

Hi,
I'm trying to run a study online due to participant privacy reasons. If the study were done in the lab I'd be using MediaLab to show a short video and record reaction times of the participants (they would indicate when a certain event happened). I still need to do the same thing online but I'm not sure how to do this.

Is there any way to imbed a MediaLab file in an online survey? Or can I provide a link that would take the participant to the video and would send back the reaction time?

I'm really not sure if this is possible so any help or suggestions would be greatly appreciated.

Thank you!
-- Jennifer

Currently, MediaLab must be installed on any machine running the study. So it's not practical at this point to run a study where participants are at home or elsewhere.