nice! i like the colour. not too saturated, and purple fringing/chromatic aberration is an issue of the lens.

focusing was a little all over the place in some scenes tho. were you on autofocus?

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Dont think it is lens issue, more on the body. Thats why a lot of videographer prefer manual focus regardless of camera model. Some of scene with people passing and blocking the view, you should have used manual focus. If peaking is unusable, use manual asist (magnify).

Eccentrical, kyLL: i dont think is lens issue (or strictly body), no matter what lens you are on, how professional kit you have, you will still face color distortion issue(maybe a good lens will minimize it, but not eliminate it), hence why ppl shot in slog or flatDR setting, and do postprocessing(color grading) to reduce or eliminate the CA.

for the AF use, maybe you can set 'selective af spot' and select where you wan your focus to stay on. but do mind you, any camera, when used in low light (example bon odori event) will suffer from AF... maybe expect A7s  ... hence its very normal for it to go hunting in mid recording.

manual focus of e mount is using fly by wire focus mechanism, which is good for beginner video usage, but professional video groupie hates it(lack of direct feel and control) unlike direct geared manual focus where the focus transition rely on your hand/skill(jerky harsh focus or gentle focus transition).. fly by wire focus has a delay and very gentle transition, but you are not in control of it, hence some (a lot) people shooting video with Emount Native lens suffer from the focus delay and usually end up turning the focus ring harder and faster causing missing the target/mark.

What was it called again, Focus Peaking? Relying on that while shooting MF, especially with Samyang!