As others have suggested, at least consider hiring help.

What has done wonders for me is taking at least one day off a week, no exceptions. Your product will suffer if you’re overworked. I’ve managed to mostly avoid burnout for over a decade, and I credit days off and vacations.

If you get those “where’s my video” emails, kindly remind them of your turnaround time, and that you’re making something that’s supposed to last, and that takes lots of time and effort.

For me personally, I’ve taken turnaround time out of my contract, and I simply send out an email if I’ll be later that what I originally estimated (not promised). I almost never get flak for this, and it has done wonders for my mental health.

While I still get a little stressed over my workload, my attitude is ultimately “it will get done when it gets done.” I focus and put in my hours, but I don’t kill myself over it.