That is correct. Natural warming caused some CO2 increase in the past and that continues variably to the present. You are correct that none of that is in the climate models. What the video may not go into, or underemphasize, is the sheer volume of manmade CO2. I am one of those people who believe that all the manmade CO2 is not a problem, nor will it ever be, and will only cause a little extra warming. We have arrayed against us a multi-billion dollar industry determined to "prove" that the extra CO2 will cause catastrophe.
There isn’t any question that the amount is massive, but the amount that is sticking around isn’t as a percentage of the total atmosphere.
It would be like saying that the amount of water emitted by my house is a disaster for the neighborhood because it would fill an Olympic sized swimming pool.
The point is, it isn’t sticking around and even if you include all my neighbors, we are still not going to flood the city.
Input output.
We are freaking on the total input to the system without looking at just the portion that is directly caused that nature is unable to deal with.
It is laid out in this video, it is like a single grain of sugar in a 1lb sack of sugar.
I strongly suspect this graph overstates the human caused emissions with the farming, because it isn’t like we just started farming in the 1750s, there has been farming even before Christ. I am sure there are other overstatements. I would just look at the actual fuel burning and take a percent of the rest, all these activities didn’t just start recently.