You have to hook the camera feed into a computer or dedicated streaming device which then pushes the video to NFHS. Essentially a splitter, but slightly more complicated. They do the same thing for the state finals.
I'd love to see an instance of that. If a school is broadcasting on YouTube, they aren't also running a Pixellot or manual NFHS broadcast. For Hudl, it's been hit or miss, because they're making use of the automated cameras in facilities just like NFHS and are having the same issues. Some Hudl broadcasts are manual feeds and as a general course, manual feeds look better. Despite what you think, you aren't comparing apples to apples. One stream could be on the school's Internet while simultaneously the other stream is on someone's hotspot. One is automated, the other isn't. One's got a bad camera, the other camera is brand new.
When people complain about the NFHS feed missing the middle 10 yards of the field or it's blurry on one side of a myriad of other things, those are camera issues. It's not specific to the service. Replace the camera, clean the lens, calibrate the focus, etc and the issue goes away. It's why I asked for people to tag me when they ser crappy streams because I can get those units flagged for repair/replacement and the going forward, things are better.