Also overheating. I don’t know about the Canon but my Sony had to have a number of settings changed to keep the temp down, and even then on a hot day it’ll shut itself off.
You don't need to do either. Canon offers a webcam utility driver for free, which offers a clean interface via microusb->usb.
I don't know about Canon, but the Sony one is lower resolution than the HDMI capture. I was able to buy a cheap Chinese USB-HDMI capture card for like $8 and it works actually quite well, and is driverless.