I think a few users forget what it was like first starting out....but I think you are doing well for a beginner....I have hid all of my beginner videos very deep, I was TERRIBLE and I did not have even half the horse you have.
There are things you need to work on like really moving with your horse in poles...try and "dance" with him more.
As far as barrels go your "stiffer" position will actually help you in your turns...in my opinion someone who can sit still and centered around the turns stays out of the horses way, I would loosen up you arms a little and between barrels let go of that horn! Other then that I think you are doing very very well.
He seems to enjoy poles more then barrels...very cute pole run you had, and not a bad time at all!
In barrels he is what I call a very ratey finished barrel horse.
I think you could fix that ratey bounciness on his front end by using two hands, really push him past it, then sit heavy in your seat and just tip his nose with your inside rein....because he is a finished horse (from what I can see) you do not need to check him as much as you are, let him do the work he knows how to do. Also, when running out get off your pockets....lean up a little and give him some rein so he can run.
By doing this I think you would have much nicer turns and faster times.
With time the natural feel of things will come....it is not expected for you to be pro status right out the gate....don't worry or stress over it just continue to try and improve and it will all come to you.
Good Luck :)