I think that that Graph at 9:54 is interesting and relevant to any discussion of Global Warming.
However, I don't have much faith in the estimates. It would be nearly impossible to calculate the total impact of temperature change, good or bad.
Most discussion of temperature change uses the year 1880 as a baseline, presumably because that is when the most accurate records were kept. Since then the average global atmospheric temperature has risen about 1 to 1.1 degrees celsius. This is a little hard to know for certain because the NOAA has been fiddling with the numbers, even changing historical temperatures that we have known for decades as part of "normalization".
However, my point is that the year 1880 was by no means the ideal temperature. In the winter of 1880 to 1881, there were horrible snowstorms in the northern plains that killed a great many people.
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