New ultra-low-cost transfer networks like Bitcoin’s lightning seem necessary and sufficient to enable something like this. I would be happy to set a budget of e.g. a few cents a YouTube-minute that got paid out automatically by my browser.
The issue is that receiving and sending bitcoin payments makes you regulated like a wire transfer service, and the resulting license costs to operate such a business are approximately 1MM USD per US state in which you wish to operate (before you can send a single payment).
It's madness. All of the cool micropayment businesses I want to start are illegal now.
If it makes the payment service provider a wire transfer service then Bitcoin and BTCPayServer already solves this.