I think they were using Streamyard and considering the stream was in 1080p likely the Professional plan at $49 a month:
streamyard.com
![streamyard.com](/proxy.php?image=https%3A%2F%2Fstreamyard.com%2Fimages%2Fv1%2Fog_general_1200x630.png&hash=6909b61862043152e3bdc4f2b04cfd9f&return_error=1)
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