Technical advice for a young hurdler?

[ESTI]

@Angela_Coon

Typically you want to be routinely doing step over drills for lead leg and trail leg, hurdles pushed down and fairly close together. ( walking over the middle of a set of say 6 hurdles and repeat)
Your next step is you spread out the hurdles ( spread out from previous drill but not regular distance) to do side lead and trail legs exercises only now with a slower run.
After you do this then you push the hurdles out further as your speed increases and finish the lead leg and trail leg drills.
Now you might be ready to go through the middle of the hurdles , first a low speed ( fast over the hurdles) and then gradually speeding yourself up ( leg speed between the hurdles) as the training continues.
The above mentioned are drills. Once the drill have been completed after a proper warm up , then you might be doing runs over 1 hurdle, 2 hurdles etc. Then you might be doing the same as just mentioned but from a proper start.
A variety of athletes not just hurdlers will benefit greatly from routine leg swings ( front to back) , Trail leg forward and backward against the wall and also side leg swings ( 20 each leg done virtually every training session within the warm up.
From what I see so far ( next time wear a bright color so it’s easier to see you from the trees and background if possible) your hips are tight and you lack mobility in this area. You need to do progressively begin to add medicine ball throws down the field as well as some basic med ball exercises within your warmup to continue to work on your core.
Arm action can be addressed by a variety of things you are doing but mainly you will use your arms as a bi product of overall fitness , upper body strength and focusing on arm action as practiced in the mirror. Think about your arms as well when performing A’s skips and running A’s as the meat and potatoes of each daily warm up. Drills of this nature will over time give you the strength and familiarity to repeat what is needed in all runs with or without the hurdles.
Notice on the last run in this video you shuffled to make it to the first hurdle? Try pushing in the first hurdle ( try one of your footlengths towards the start line to begin with ) and see what happens? Maybe you need to use 1.5 of your footlengths to begin?
Lastly, listen to Esti as he doing a fantastic job coaching young high school aged children and having fantastic results.

Great advice on hurdle warm-up! I use something similar.