I'm not sure which discpline you're aiming for, but if you wanted to look into Dressage - I would like to see you drop your stirrups a good few holes, sit back on your seat bones and try to imagine that you're making a capital 'D' shape with your torso (think of an old man with a beer belly ;) ), this image will help you to effectively engage your core muscles and use your seat to drive the horse, rather than sit on top being a passenger.
I would try lowering your stirrups a hole, and see if that doesn't help you post with less rise. You can always shorten them again if you don't like it. You look very calm and relaxed in your riding, which is great, but I think you might be putting too much muscle into getting high up in your post, which is unnecessary. You just need to get your weight off her back. Agreed though that it's hard to post on a slow horse, because you have to stay "airborne" long enough to get to the next landing step.
Your sweet horse almost looks like she'd be easier to sit the trot than to post. Towards the end of your video, she lowers her head and slows and almost looks more like a Western horse. If she's normally faster and more spirited, let her move on out. You don't want a peanut-rolling English mount.
If you pull your leg back, you'll be able to get a more open and close motion with your hip flexors, rather than an up and down motion with your seat. In the rising, you don't actually want to come that high out of the saddle :)
I agree with what others have said about posting on a horse that is just plodding along never really feels good. It's just going through the motions. I know you say she is a high energy spooky horse, but if you can engage that engine and get more impulsion out of her, she will start reaching for the bit and become more focused on you than the environment around her. Many horses become far less spooky once they are on the bit.
I know I already replied, but I couldn't help myself :P I've seen others say you have nice, soft hands- they would definitely improve if you had more of a bend in your elbow :) They are a little too straight to create the give you're looking for :)
Thanks everyone for the input! I've been working a lot on the trot, getting my leg back and not leaning forward. I actually started using a dressage saddle, dropped t stirrups a notch and am focusing on keeping my shoulders back. I'm allowing Bridgett to move out more, which helps some but its a struggle to keep her trot at a happy medium. She either goes too slow and stays slow, or starts speeding up to a very quick trot. I suppose that's my fault though, any advice on how to allow her go move out without her speeding up too much? I'll try to get another video soon Posted via Mobile Device
I have a hard time posting....it just feels very uncomfortable for me....unnatural almost. I never had lessons when I learned to ride.....i was put on a horse and they sent me off to figure it out on my own...lol It feels like I am going to fall forward when I post....id rather just bob up and down! I only trail ride.....do I really need to post on the trail?