The first thing I noticed is your lack of leaning into the run. Starting from a 0 velocity, you should be leaning more nito the direction of travel to facilitate more force exerted in acceleration. Also, I think you could use more arm movement…it doesn’t look complete to me. It looks to me as if your arms aren’t being used to increase speed, though that is an indiviudal limit that is dependent upon your flexibility and strength. (Look at elite sprinters starting..their arms are almost completely straight when they reach the apex of swing. Possibly to counter force exerted by oppostite leg?)
This may come with leaning more into the direction of travel, but your feet seem flat during the run. if you lean more into the run, you should wind up more on the balls of your feet, which should cause better acceleration.
Participant