Simgot - EW100P

I've never done video mastering, but I'd assume you want something fairly neutralish. Maybe with a little of the V-shape signature that is so popular these days. I'd recommend the Truthear Gate. It's one of a few Neutral-ish options under $25. (Tangzu Wan'Er Studio and Simgot EW100P being the other two I would recommend) What sets the Gate apart is that it comes with a better cable than the other two, and includes a carry pouch. The three sound very similar to each other. The Simgot has a bit of extra top end, and the Wan'er Studio is a tiny bit warmer. The Gate sits in the middle and is very resolving for the price. Feel free to pick one of the other two if you know you prefer a bit of extra treble or a bit of extra warmth.

As someone who is heavily into speakers, the original salnotes zero is pretty true to neutral speakers. The original chu also. The simgot ew100p is a step above that. What do they all have in common? The adaptation of the Harman IE 2019 target for the b&k 5128 rig. Especially in the critical regions from 1khz-5khz. IMO that is the target you want an IEM to hit(at least up to 5000hz) if you are actually serious about accurate sound reproduction.

Iems are fine for music production. You just have to be VERY picky with the frequency response. Anything that follows Harman IE 2019 (B&K 5128) is fit for music production. This is coming from someone who has anechoically flat speakers with linear directivity index. Honestly I just wouldn't recommend headphones over iems for the pure reason that stuff like the simgot ew100p exist at under 20 dollars that get the "critical regions" of timbre near perfect