Can't help someone who won't listen.
Problem here is not the form or technique of your toss, the problem is the LOCATION of the toss.
Like I noted, your serves IN THE VIDS look like warmup serves....no legs whatsoever, just an arm motion. That is what you posted, that is what we see, that is what we judge.
Now if you actually serve 125 and play at 5.5, we can believe that, but it's not what you showed in your vid.
You show a warmup motion, feet planted behind the baseline, little to no leg upward thrust.