Like the video. Sky looks so chilled he looks like he's in slow motion at times. He's in nice shape. Good for you two. I practise both disciplines myself cause I think it's great to learn new things all around.
I haven't read the rest of the posts yet, but I disagree with sitting back on your pockets more. The problem is not your seat, but your stirrup length because your leg has shrunk up through your near. Drop the stirrups two holes and stretch your legs down and underneath you. That will change everything!