No footage at night that i've seen, but the documentary "Die Bergretter - Unterwegs mit der Air Zermatt" is well worth a watch, although foreign. I saw it a few years ago but don't have any links - I guess for a private operator the chances of having camera team in place are slim, and of little importance when dealing with something like this.
Air Glaciers, Air Zermatt et al response to coach crash
Air Zermatt were supposedly the first to do night rescues in the mountains many years ago (certainly in the region) in Alouettes and Lamas - no autopilot/autohover/winch-man-steering/nvg. Amazing. They've just taken delivery of their first bell 429, apparently to enhance their night ops.