generally “tethering” does NOT allow live streaming as a webcam - you generally need special software for this or a Video Capture card so your camera becomes an available “camera” option within your streaming software - see using your digital camera as a webcam
Introduction
professional photographers in studio shoots often prefer to work with their cameras tethered to a computer which enables:
immediate display of the taken image on the computer for closer analysis of adequacy of the image especially when checking for focus accuracy, subject movement blur and blown highlights
immediate computer copy of the RAW file as insurance against card failure
most need to use a long USB cable BUT you do need a special cable to avoid signal loss:
it allows one to see a live view of the camera and remotely adjust camera settings and focus point plus trigger the shutter or movie from the computer
this can be achieved via the supplied USB cable (NOT the HDMI cable) or via WiFi
set your camera's USB mode to the PC-camera icon
it can be used with Lightroom using LR's Auto Import function accessing the same folder as Olympus Capture and then LR can automatically move them to your preferred destination, and add import settings and keywords automatically: