R8 overheats quickly streaming 4K over HDMI. Anything I can do?

[dreet]

I've been running dual system for a while, with an R5 and an A7C. One thing I use the A7C for heavily is streaming/teleconference, running 4K HDMI output to an Elgato. It seems to be able to do this indefinitely. I had hoped to combine my kit by subbing an R8 for the A7C, but the camera is overheating after about 40-50 minutes. This is indoors at room temperature with no sunlight. I need two hours to even consider this setup viable, and right now this is a dealbreaker. Is there anything I can change that will allow me to run for long stretches, without stepping down to 1080?

[rs-eos]

Do you absolutely need 4K?

These cameras, while they do have video features, do not provide those features as a primary function.  You'd be much better off with dedicated video equipment. e.g. Canon's cinema cameras to include the EOS C70 and EOS R5C which have built-in cooling.

If you don't need large sensors (Super 35 or larger), consider also looking at various camcorders.