Prior to even looking at your video, my comment is that doing that extra set at 155 was a mistake. You miss 1/15 of your planned reps, what does that mean? You got 93.3% of your planned work in, plus some unmeasurable but still present stimulus from the missed rep, assuming you didn't just drop the bar on yourself and let it lie there. In such a case, you lick your wounded ego and move on to the next lift, trying 175 again the next time.
There has been some discussion of late whether the LP ends because of insufficient stress to continue to drive adaptation, or lack of recovery from workout to workout. My experience is that it is both, but the fatigue factor is a bigger one in the short run. Meaning, your LP won't continue for months and months longer by increasing recovery and reducing fatigue, but it can continue longer for a matter of weeks, often, without doing anything that is a drastic "peaking" volume cut that puts you in a bad place to continue training as an Intermediate.
So what you did was exacerbate the situation with your extra set, and your performance today - worse than last time - actually bears me out. Because you couldn't have gotten weaker since then, right? But you could very well have - and almost certainly did - get more fatigued, by your extra set at 155, and then Monday's heavy presses.
I've also seen this enough times before that a) it's no surprise to me, and b) is one of the reasons and indications that fatigue is a short-term cause of LP's end and fatigue management is thus a useful factor in extending an LP without significant reduction in total work, that messes up your transition to Intermediate programming.
Now I'll get off my soapbox and talk about your form.
There's nothing awful here, so it's not like a major form error is holding you back. I suspect you're just running into the normal LP phase where you miss a rep.
A few small things though:
1. Get yourself fully set, butt on the bench and shoulder blades retracted and held back, before you unrack. Don't still be in process of doing those things as you unrack the bar.
2. Really memorize and sear onto your soul the spot on which you want the bar to touch, and bring it directly there.
3. Your grip width looks too narrow for your elbow angle - but I can't tell from this video whether your elbows need to be tucked more or your grip moved out. My guess is grip is OK and you need to bring the bar down by bringing your elbows down a few more degrees.