Earlier quoted context omitted.
My three primary cameras right now are a LUMIX G9 (newest, the recent firmware upgrades put it on par with the GH5 for what I do and it has a full-size HDMI port which matters a lot ), a GH4, and a G7; my off-cam/desk webcam is now my oldest camera, which is a GH3. The latter three all have the same sensor but the GH3 is a lot slower and has worse dynamic range and internal processing.
Gosh, this is educational. I've always assumed (as a happy Olympus user) that m43 was mostly a photography format, and video people were all using Canons. I've recently been hooking up my Olympus as a webcam, through tedious necessity - and of course it took a bit of adapting. I had no idea any mirrorless camera had a standard full-size HDMI port on it.
The G9 and GH5 both have full-size HDMI (the GH4 does with the bottom adapter we all call "the Brick") and lemme tell you: it is a life-changer. Having to balance micro-HDMI (G7, GH4) and mini-HDMI (GH3) cables were bad enough and I look forward to adding more G9's to the kit so I can stop doing it entirely.
Video is a real rabbit hole, though, and not having to spend wild money on video cameras for completely acceptable quality has really helped me out. The way I typically run is that I go from the camera to a Blackmagic HDMI->SDI micro converter, but those top out at 1080p60--which is fine, currently, for stream-first stuff, but I'd like to move to "stream at 1080p, record for YouTube at 4K" as I turn my event production stuff into a real business--so I've added a Blackmagic Quad HDMI capture card that all of these cameras can just throw 4K60 at natively. Of course, SDI cables can run 100 feet and HDMI starts getting mad around 15, so there are baluns in my future, too...it's all weird.