(de)activate mask with mouseover?

hello,
theres a big problem! I have to do an animation till friday, and I have no idea how to solve the problem!

I´ve got a videoclip in flash. In the first keyframe is the first picture of the video I rendered. In the second keyframe theres the video itself.

On the picture/in teh video are three persons. I want to mask each person, so that when You rollover one of them, the video starts to play and only the masked person is moving. When You rollover another person, the mask changes so that the other person is moving now.

I importet the video three times in flash and took three pics each one with another person rubbered. So when You rollover it jumps to the keyframe where the person is rubbered an the video starts to play.

now my swf is 156 mb big!

Is there a possibility, that I only need the video one time and while rollover the mask is active on the selected person. Also the video should start at the beginning?

please help!