Despite the terrible angle, the deadlift looks at least a thousand times better than the first video.
That said... you still need to work on bracing your torso harder. There are a few things you can try beyond just "big breath and brace your abs". Try lifting your chest up harder in your setup and engage your lats "harder" by pulling your shoulders down (not necessarily back). Some people say "try to tuck your shoulder blades into your back pockets".
Also, and this is probably much harder to get right (at least it was/is for me), you're still initiating the pull with your quads rather than your glutes and or hams. If you watch closely, you can see that the movement is initiated when your knees first extend.
Compare the angle of your back relative to the floor in the instants before and after the bar leaves the floor. The angle of your back becomes *more* horizontal in the instant after the bar leaves the floor. Another way to think of this is that your hips move up before your shoulders move up. Basically what it means is that your knees extend before your hips (raising the level of your hips) which means you are using your knee extensors (quads) to break the bar off the floor, when ideally you want to be using your hip extensors (glutes) to break the bar from the floor.
Essentially it is the same error as you had in the first video, it's just that it's not as exaggerated because now your hips are starting higher. I have a feeling though, if you paused both videos in the moment after the bar leaves the floor, your back, knee and hip positions would look identical.
It's really hard to get this right. You can try lots of things like thinking about externally rotating your femurs (push your knees out) at the start of the movement. Lifting your chest up at the start of the movement. Pulling back on the bar. Pushing the floor away from you rather than picking the bar up... experiment with different cues until you find something that works...