Worth knowing that the $400 is probably only for a limited license, meaning they can use the clip in one ad for a set time, not own it forever. That's a big difference, because if the ad does well and runs for a year or more, they'd normally pay way more than four hundred bucks. Also, since your 11 year old filmed it, you technically own the footage as her parent, so you're the one who has to sign anything. I'd ask them straight up what the terms are before agreeing to anything.

Wait, 500 apps since January is not a grind, that is a full time job on its own! But here is what I want to push back on: your referrals number probably looks low because of how you counted it. You said 12 came from the Slack group, but what about the recruiter who found your resume on LinkedIn and reached out? That is a real person too. And the friend who forwarded your name to their old boss? Sometimes that never shows up as a "referral" in the sheet, it just looks like a normal application. I bet your real human touch number is way higher than 12 if you go back through it.