Interesting device. Sorry, saw this post earlier, but I have been working on it a bit. Thought I might give you a more detailed response if you are also putting in the effort to watch and attempt some of the stuff on the video's posted.

I will note that you can learn huge amounts of information from video and I obviously shoot video and I use video heavily as a training and a diagnostics tool for both myself and to help students. So keep using video, but it is also important to understand what you are looking at. Overall you have a workable technique but there are several small details that when combined give a larger error on target. So, I often tell people that it is good if I nit pick (fine tune) you because that means there are no huge problems to overcome. You may know some or all of the following, but I will nit pick or offer some food for thought just in case.
You obviously have either a pre-ignition push or poor timing with a post ignition push. More evaluation would be needed to figure out which it is, but someone who knows what they are looking at and knows methods to determine which it is, we can quickly enough determine if it is a pre or post push. We all know what pre-ignition push is (flinching), however some shooters develop a post ignition push out of bad habit and can also be a flinch. However more advanced shooters purposely use a post ignition push to help return the pistol a bit more quickly rather than relying on a more neutral alignment to settle the pistol. It is used to reduce muzzle rise even more. They can both look the same when the hammer or striker falls on an empty chamber and even use of dummy rounds and they will both look the same so correct diagnosis is critical.
A post ignition push can be just as bad as a pre-ignition push if you are not spot on with your timing. Some shooters whose skill develop start using a post ignition push without knowing what they are actually doing and don't have good results. Learning and executing it correctly is not as easy. So unless if a shooter is very skilled and competing at very high levels the post ignition push is not going to help 99.9% of shooters. I will say that I do employ a post ignition push in some of my shooting and if I were to be using dummy rounds in a string of fire you will see it happen. Again 99.9% of shooters won't know the difference when seeing it.
Next is your follow through which you already hit on. Tracking and staying on your sights is key, even if you are only firing one shot, but even more so if you are shooting strings of shots. Always obtain a final sight picture and maintain it a bit longer to force you to keep your head down. I call it "keeping your eye on the ball". Just like in golf or baseball, what happens if you look up and take your eye off the ball? You miss or shank the shot. Same with shooting. One round fired = 2 sight pictures, 2 rounds = 3 sight pictures, etc and over emphasize this in training drills. We all want to see that magic hole appear in the paper or are in a rush to look up and assess our shots on paper, be mindful and try not to fall into that trap. You also come all the way off the trigger very quickly, I mean completely off the trigger. This causes issues with grip pressures and unwanted movement. I will talk more about the trigger next.
Also work on a sharper or stricter front sight focus. This also helps with sight tracking and follow through. As a shooter progresses, they can work into alternate sight pictures where our visual focus may change, but for now, strict front sight focus.
The elephant in the room, if not obvious is trigger control. Trigger control
IS marksmanship. You are very hard on your trigger. As an example, Robbie Leatham and some other great shooters will tell you to acquire your sights and jerk or slap the trigger. Most of those guys are #1 running very fine tuned, straight draw 1911 triggers with short throws or are #2 super human in their skills developed over more rounds than most people can even imagine shooting.
Having said that you come pretty far off the trigger way past reset and then jerk or slap the subsequent shots. I am not talking about "riding the trigger to reset" as I don't do this either, but you are creating issues with your current technique. This will kill you even more so on a DA/SA trigger where trigger pull weights change from DA to SA and also on trigger like the DA/SA CZ where the trigger has a lot of overall travel distance, unlike say a 1911 that has little to no pre travel, breaks crisp and very little distance back to reset. I can slap or jerk a good 1911 trigger all day long, but need more care on Sig, CZ or even a striker fired or any pistol with a hinged trigger which is pretty much most everything.
I pretty much suggest a touch, prep and press as to where some suggest a straight pull through like a revolver. Both techniques can work and there are pros and cons to both just like anything. With this type of method you also need to work on or think about "resetting during recoil" to where the trigger is reset and re-prepped as the weapon is going through the recoil phase. This is hard to accomplish if we use a slap or jerk method and on a trigger that is not a 4lb 1911 straight draw with short engagement, results are often poor, unless your name is Leatham. You can google these terms to find our more info, or hit up pistol-forum for a lot of great pistol shooting information.
On the plus side, your grip looks solid but I would be interested in your grip pressures throughout the trigger pull and follow through phase, but from what I see in the short clip, it looks pretty good. Hard to tell from the angle of video, but I might like to see your head a bit more erect with less engagement of the traps and other neck muscles. There is good tension and bad tension. Most people might grasp the concept but don't understand how this really works, or how to make it work.
Overall the things I mention are small but important details. Add up a bunch of small issues really add up quickly when you are pushing fundamentals. On the plus side, you can be fixed fairly easily provided that you get a chance to work with the right person who knows how to correctly diagnose and then knows how to fix the issues because all shooters are a bit different in how they learn or perform. The downside is that these are pretty advanced things to ask from an average or even above average instructor and finding someone that can do it well can be problematic.
Sorry for the long post, but I hope it helps.