Hi joeman18,
There seems to be some confusion about using a DSLR as a webcam. The EOS Rebel T3i (EOS 600D), with or without the EOS Utility software, is not designed to be used as a streaming device.
EOS Utility has access to the camera when the camera is connected to the computer via USB. It is not designed to capture an incoming HDMI feed and broadcast it to the web.
With that being said, there may be a work around or setup that other camera users have had success with for streaming with a Rebel T3i. I can tell you that to use an HDMI feed your computer would need an HDMI input terminal (not the typical output terminal) that can receive an incoming video feed. You would also need a program that can capture and/or broadcast the HDMI feed.
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