This is the method I use, in conjunction with the Sony ZV-1 which gets a mention in the article. It also bypasses the problem mentioned in the article about turning up as a mass storage device.
What I've found is that by USB charging and using HDMI out, it's good for ~2.5 hours of streaming, which I've only ever hit once as a limit.
there's a newer Sony in the same line (the ZV-E10) but it moved the ports to the other side of the camera, so if you flick the LCD round so you can see it, the cables are in the way...
I've been using ZV-1 with Cam Link for almost 2 years now. It can be powered indefinitely with a good micro USB cable and a reliable 2A+ power supply. I often have all day back-to-back meetings so I don't bother to turn it off. Otherwise a dummy battery is an option.
With my a6300 I actually managed to get a week (!) of constant streaming and USB charging out of it. I use a USB data blocker to enforce USB charging only, it works incredibly well.
If you enable PC Remote Function [1] it disables UMS so you don't need another cable/adapter plugged in. I notified the author and he updated the article.
What I've found is that by USB charging and using HDMI out, it's good for ~2.5 hours of streaming, which I've only ever hit once as a limit.
there's a newer Sony in the same line (the ZV-E10) but it moved the ports to the other side of the camera, so if you flick the LCD round so you can see it, the cables are in the way...