Sony A7S III vs. FX3 for YouTube Talking Heads – Which One Should I Pick?

Honestly, for your use case, I'd go with the FX3. The built-in fan is a game-changer for long talking-head recordings – you'll never have to worry about overheating, even if you're shooting in 4K 60p for hours. The A7S III is great, but it relies on passive cooling, so in a warm room with continuous recording, it might shut down after 30-60 minutes (though Sony's firmware updates have improved this, it's still a risk). Plus, the FX3's XLR handle is perfect if you ever want to plug in a shotgun mic or wireless receivers without an external audio recorder – that's one less thing to rig. The menu system is also more video-oriented, with direct access to S-Log3, Cine EI, and a dedicated record button. The lack of an EVF isn't a problem for you, and the FX3 has the same 12MP sensor, so low-light performance is identical. The only downside is no mechanical shutter, but you don't need that for video. I'd say get the FX3, and spend the extra savings on a good lens or an external monitor if you need one.

Great point, and I've actually decided to go with the FX3! I did more research after reading your reply, and the fan reliability plus the XLR handle sold me. I also realized that the FX3's form factor is more modular – I can easily rig it with a cage and top handle for handheld B-roll, and the lack of an EVF means I'll rely on my monitor for framing anyway. I'll be pairing it with the Sony 20mm f/1.8 G for indoor shots and the 24-105mm f/4 for flexibility. Thanks for the help – you're right, the A7S III is more of a hybrid, but for a dedicated video creator, the FX3 is the smarter choice. Problem solved!