So you are switching out heeled for flats? Why tho?
How much do you squat high bar arse to grass?
5 weeks out is often plenty of time to adjust but that’s usually considering that you’ve been rotating low bar comp style squat in leading up to every comp a few times per year minimum or more e.g. during training, not olympic high bar arse to grassing for years.
Maybe some tweaks to your high bar e.g. lower bar position and wider stance would let you make the most of / get the most carryover from your last 3-4 years of training the squat. Just a hypothetical tho, if the numbers for low bar far exceed your high bar ignore the above.
Maybe widen your stance out a bit. You know that nice rebound / stretch reflex you get out of the bottom? It tends to move up a bit i.e. to just below parallel vs arse to grass if you widen your stance up. If you aren’t using the stretch reflex you’re losing a lot of potential weight on the bar. The direction your toes point and knees track should be adjusted outwards a bit too if you go wider.
Also cue yourself according to your needs. e.g. if you are (kinda look like you are) one of those dudes who fail by getting bent over and snapped in half out of the hole you can cue driving up with your back into the bar during the ascent.
Some dudes squat more upright and won’t get bent over even with max weights so this cue does squat (ba dum tss) for them.
Besides that … probably the usual stuff.
Set up tighter because you can always be tighter. There’s seems to be a lot of shaking wiggling etc. going on between the unrack and initiation. Speaking of the unrack is probably worth it being a bit more patient i.e. letting the bar settle before walking out.
Maybe tweak your descent a bit e.g. descend as fast as you can while maintaining tightness in the right sequence/position. Start the descent controlled so you maintain good positioning for the next most important bit: Accelerate into the hole to maximise your bounce back out. Might be my eyes playing tricks on me but looks like you slow a bit into your bottom position.
At 5 weeks out it’s pretty much peaking/fun time. Enjoy and good luck mane.