We describe the use of professional-quality high-definition (HD) videoconferencing systems for daily HEP experiment operations and large-scale media events. For CMS operations at the Large Hadron Collider, we use such systems for permanently running "telepresence" communications between the CMS Control Room in France and major offline CMS Centres at CERN, DESY, and Fermilab, and with a number of smaller sites worldwide on an as-needed basis. We have also used HD systems for large-scale global media events, such as the LHC First Beam Day event on Sept. 10, 2008, the world's largest scientific press event since the moon landing. For such events, poor quality audio or video signals or equipment failure is simply not an option. We describe the systems we use today and our views on the future of HD videoconferencing and HD telepresence systems in High Energy Physics. We describe how high-quality, easy-to-use, extremely reliable videoconferencing systems may be established in a HEP environment at an affordable cost.

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