I have shared a link to a time sequence I captured using a different software package (VideoPoint). Disregard column C (x [m]) as my beam is only moving in the y-direction. Column E (v_y [m/s]) and F (dt (s)) I calculated separately after capturing the y position by manually clicking on each frame. Column E is simply (y2-y1)/(t2-t1) and column F simply (t2-t1).
Thank you for any assistance.
https://www.dropbox.com/s/1yymzvhwlm5nvns/Time%20Sequence.txt