have you considered frame counting it because it seems to not be lower than 5 seconds to go the video and press . to go forward one frame when you get out of the green part of the spawn, start counting
pause it and when you get to the frame that you get out of the green spawn press . until you reach the edge of the winners spawn
I use something called virtualdub. It allows you to go frame by frame so you can retime. find the frame you leave the spawn point square and find the frame where you touch the yellow pad at the end. Now subtract the lower number from the higher number. Finally, divide the amount of frames you got by the fps you were recording at. for example, my any% run left the spawn point at the beginning at frame 10313. And hit the yellow pad at the end on frame 10442. subtract 10313 from 10442. The answer is 129. Then I divided 129 by 30 since that was fps I was recording at. And 129 divided by 30 = 4.300. So the time of the run was 4.300 seconds. But I submitted it yesterday so it hasn't been verified yet. Hope this helps!
Download something called virtual dub then open the video in virtual dub. There are arrows at the bottom the the window so you can go frame by frame. Find the exact frame both of your legs leave the green square then find the frame one of your legs touches the yellow pad at the top. Then subtract the smaller number from the bigger number. And that is how many frames the run is. If that is what you mean by frame counter.