It was still a misleading comment, to try and pretend that infrared thermal radiation could not leave the Earth.
There’s a lot of misleading information. If I understood right, it says that clouds don’t trap heat, but instead transfer it from the upper atmosphere. No, they pretty much trap heat by reflecting it back to the surface. I don’t doubt that the greenhouse effect is real, only that humans are a significant contribution, or that the effect of CO2 is as straight forwardly terrible as they’d have us believe.