It's unsettled at this point. Of course, there are segments within the Democratic Party (to say nothing of the non-libertarian faction of the entire GOP) who either dismiss "defunding" or seek to neuter its radical dimensions through a focus on procedural reform (i.e.
https://8cantwait.org/).
But right now the movement against bloated police budgets is live. My point here is that you're right about the forces against defunding, but their opposition is to be expected.
I'd encourage you to keep sharing clips like the one you circulated above and to stress the point made by the great Angela Davis: The "threats to safety, threats to security, come not primarily from what is defined as crime, but rather from the failure of institutions in our country to address issues of health, issues of violence, issues of education."