Will be doing a livestream for a major company later.
(to a web based software rather than OBS -> Youtube/Facebook)
Especially when there's multiple camera and microphone involved, it's not easy.
I've spent quite a lot of time and resources to make sure a reliable and good system is working.
Main equipment list :
Two 5D4. Has to be matching cameras to ensure better sync (though still not perfect).
The 5D4 actually has a LP-E6 AC adapter you can buy. And technically you can record 1-2 hours long video through the clean HDMI out. The internal recording is still stuck to 30 mins.
One Zoom H6 recorder
Three Rodelink wireless Mic
Blackmagic webpresenter, a SDI converters , cables and a few more accessories
A laptop
Even with this setup, I can only achieve a 720P stream. It's way sharper than any 1080P webcam of course, but the pixel resolution is only 720P.
So many things needed, while a mobile phone can do something similar (although at a much poorer quality).
DSLR/Camera tech needs to catch up quickly.