No idea. I’ve never used a 100D (Rebel SL1 to Americans), and I don’t shoot video.
I took a quick look at the 100D manual, and the camera has a mini HDMI port, but I only saw mentions of using it for playing back video in the manual. It didn’t say that it can be used for monitoring video while it’s being taken, but you can test it. Get a cable and connect the camera to an HDMI port on your television or a computer monitor. If it can send the video stream to that while you’re recording with the camera, then it *should* work with the monitor in your Amazon link. No guarantees, of course, but if you *can’t* send it to your TV, then you probably won’t be able to send it to the monitor.
There may be menus on the camera to allow you to set the properties of the HDMI output (resolution, “clean” or with information display, etc.). I didn’t see any menu descriptions in the manual I looked at, other than custom functions, so I don’t know.
Worst case, you’ve bought a cable that you won’t use again, and you’ve learned something.
Hope that helps!