On the dressage: Try to hold your hands higher and closer together. When you go over a turn, think of using your outside leg to move him over rather than using your inside to pull. Also make sure on turns that you aren't leaning in, keep your hips, heels, and shoulders aligned and over each other. Think more of turning around a merry go round pole rather than leaning when you turn. Also, your left side is collapsing which probably means you have a stronger right side. Think of inflating your ribcage on the left so your left side does not collapse. Try to straighten your back and shoulders a bit, imagine a hand pressing against your chest and you are pressing back but not leaning forward. You should also relax your elbows and wrists/hands, as they are a bit rigid and holding the reins. Your arms should feel connected to your reins, and the whole line from elbow to the horse's bit should feel like an elastic band rather than a piece of wood.
I won't critique the jumping because I haven't jumped in a year, so I would not trust my own judgment.
"The trouble with the world is that the stupid are certain and the intelligent are full of doubt"