Drawing a straight line over a video

Is it possible to draw a straight line over a video in CS6 and also to watch the video frame by frame to take exact timings?

Hi Jeff,
Back again! i have managed to put the line over the video and can have it on there as long or as short time as i wish, but it appears to be moving with the video and i need it to stay at a certain point and the video to carry on playing. Basically im trying to mark a point on a race track where the horse in the lead gets to, then i need the line to stay there for when the last horse comes to the line, with the lead horse moving on past. Currently the line doesnt stay on a specific point it on the video and go out of shot when the video moves, it appears to be moving with the video. I know the overlay is a static image but is there a way of making it look like it stays in a specific place on the video?
Hope this makes sense!
Thanks Kat

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