okay. You start with your hip rotation, pointing your knee inside, but then when you pivot back out, you pivot around the plant foot - your hip doesn't open up prior to everything else.
What you want is to open your hip and have that turn your torso and have that tug your arm, then pull.
It looks like you're trying to use weight transfer with both feet planted. I'd stop that now. Just use rotational/pivot power. When you want weight transfer, just lean back on your left (maybe pick up your plant foot), then step down to your plant and pivot / pull.
So. Do do the weight transferless throw. Just pivot your hips back like you are. Point the disc back on target a little better. As Skabob said, it's a little out to one side. Don't throw your weight over your back leg, just pivot your body so your chest faces away. Your goal here is not to "heave" the disc, but to rotate as fast as you can. This is what's getting the disc out there.
I'd also strive for much shorter shots. It's hard to do, but just relax and focus on your pivot and rotation. Don't worry about the discs until you get the feel right. I'd throw a pylon or something out at about 100'-150' and practice just popping a putter out to that with no weight transfer in your shot.
You also need to separate your hips and torso in the rotation. Just stand still and practice pivoting your hips first, then your torso. Discover at which point the hips cease to rotate and your torso gets it's first motion, then work on getting that transfer smooth. Once you have that working, see at what point your arm begins to move when your torso rotates. When you have that, work on starting your pull there.
It looks like as you come across your chest, you're leaning away from the disc. This appears to be causing some anhyzer release. I'd like to see you leaning forward more. Try moving your right foot forward so that your right heel lines up with your left toes. Then when you throw, push off so that you have to get over your right toes with your chin.
As for DGDave's comment about is standing still helping. I wanted to comment (for anybody interested), that if you practice this, you should be able to get throws out to close to 300' or better and it will require less movements to coordinate, so hopefully, it will be easier to get more consistent results. Also, once you have the stand still shot down, then you will know what the benefits are when using an x-step.
Adding the x-step will add weight transfer motion and more speed into the equation. What I've had the tendency to do is to pull around instead of straight through as well as swoop instead of staying flat when I use an x-step. Thus, my accuracy is decreased, I get a lot more nose up and my distance could be the same or shorter than my stand still throws. If I do it all right, I can get a lot more distance, but there is more to go wrong.
Keep up the work - I think it just hasn't totally clicked yet
