Climate change is real and has been proven by climate scientists, including the IPCC and others. The resource explains the role humans contribute to increasing CO2 which eventually warms the planet. However, the video states that variation in the earth's orbit is a major cause of natural changes to climate. But this is not the only natural cause. We have other important natural factors such as the sun's angle/intensity, natural greenhouse gases, volcanic eruptions, continentality effect, and the other Milankovich cycles which cause climate change at a slower pace.