Good camera for live streaming outdoor events?

Andrew S10 wrote:

I think for your situation, a consumer camcorder like a Sony FDR-AX700 should work fine, but you'll need to confirm that it can output a clean HDMI feed.

You'll also need an HDMI to USB capture device, the cheap ones top out at 30 Hz, use the MJPEG codec, are prone to macro-blocking artifacts, and can shift the gamma & gamut, so you might go with an Aja U-Tap if quality is important.

Most cellular data plans (even ones that claim to be unlimited) throttle your speed after using a couple gigs of data, so double check that your carrier & data plan can support uploading vides at the necessary data rate for 5 hours straight.

Is audio important? Do you need to hear the announcer well? Did you have any thought or plans for audio?

P.S. A tripod with a fluid head will yield the best results for panning shots.

I forget to tell that I already have Elgato Cam Link 4K capture USB-device. Audio is not that important but of course it is ”nice to have” or nice to hear what is going on around

We have quite good cellural data plans here in Finland. No limitations so far for data and speeds are pretty good with 4G or 5G. I only have one on my cellphone but maybe I can use it as a wifi hotspot so there is no need for another connection? 
I think I need to check that Sony FDR! Do you know how long is the batterylife for that model and is there option to add external battery like D-tap?