Especially on the shanked throws it looks like your elbow isn't loose enough and the disc comes through and releases a bit further away from your body than the technique you are looking for. Your release isn't always consistent either so you some times get grip lock and release late. Thanks for posting the vid though, it gave me the idea to video some of my drive releases. BTW, looks like a nice fun course you are playing there.
What do you suggest to get the elbow to loosen up? I took some bad advice when I first learned disc golf and threw every throw with my elbow completely locked. Did that for probably a few years, so it's probably some old habits set into my throw.
Those are very fun courses.