If so, please advise
I know you can install some firmware from a 3rd party site but I don't trust it.
Magic Lantern or something
Do not, I repeat, do not install any changes to your firmware to allow it to be a webcam. Your camera is electronically incapable of outputting clean HDMI without a major firmware change. Nothing is free. You always give up something to gain something.
If you're trying to use the EOS Webcam Utility, here is a simple observation that I have made. Does your camera support remote shooting with the regular EOS Utility. If so, then your camera contains the ELECTRONICS to support that type of operation. If your camera does not support remote shooting, then the EOS Webcam Utility will not be able to control it.
Okay but I've seen people do it on Youtube
Are you saying that there's a risk of damage, if I make a firmware update? Damange to the existing firmware and to the functions of the camera potentially?
Lastly, the canon utility pack to turn the cam into a webcam does not support the EOS M10.
SO I guess I can't or shouldn't use this as a webcam then huh?
Correct. If the Webcam Utility does not list the M10 as being supported, then it will not work as a webcam, most especially if the camera does not support Remote Shooting with the regular EOS Utlity.
Again, I do not advise installing 3rd party firmware in your camera.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.