Hi aga,
OK, so first up, is there a crime? (The burn-out isn't on private property is it?) NSW has some pretty tough anti hoon laws right?
ROAD TRANSPORT ACT 2013 - SECT 116Conduct associated with road and drag racing and other activities
OK, so assuming the burn-out is on a public street, and you've got video, the police ought to thank you for collecting the evidence for them. But they don't, right?
I give this advice a lot: you need to put these details into a formal complaint. Have a read of this page:
Community Legal Centres NSW - Making a formal complaint about a NSW Police Officer
Essentially, the police don't want to spend the time to address your hoon problem, so you need to make a written complaint, this can't be ignored, leaves a paper trail, and after a few complaints stack up from you, they'll act on it. Or else someone higher up can be embarrassed, by a viral video, for example.
You could also try a local "get tough on hoons" politician... Ask them to speak to the police on your behalf.
I hope this helps,
Regards,
Gorodetsky