Here's an interesting paper about population growth between 1960 and 1999, when world population doubled from 3 to 6 billions:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3777609/
Interestingly, in the 40 years while, the increase of food supply was even higher than the increase in population, meaning we even produce more food per capita now than in 1960:
And the 1990 UN world population projections show the probability are not even 1 in 2 for the world population to double again, at least not in the 21st century. It could even be decreasing back to 6 billions by the dawn of the 22nd century.
There are a lot more interesting details in the paper, but it would take too much place to repeat it all in one post, so feel free to follow the original link if the subject interest you. Therefore, there is nothing to get anxious about, even the land use in Europe is changing as less arable land is needed to produce the same among of food. Hence, land is left wild and the wolf is coming back.
Back to Tomenable video, the one thing they aren't talking about is the major improvement in medicine. Back to the early 1900s, you would expect between a third to half of the kids in any given family to die young. Nowadays, one can realistically expect all of their kid to make it to adulthood. We don't need spare children anymore. Another part of the equation is government is taking care of the old people. So we don't need to have extra kids, in hope some will make it to adulthood, so if we manage to get old, one will be prosperous enough to take care of us in addition to their own kids. Even with this kind of calculation, population wasn't growing too fast up to 1900.
Fast forwards to WWII, major improvement in medicine made people live much older and nearly all kids to make it to adulthood, while people still had large families. This is what caused the population to explode in the 20th century. The peak is passed in much countries, there may be some region in Africa where they haven't reached it yet, but most of the continent have already declining birth rates. Even if we do reach the number of 10 billions as in UN's average scenario, we will probably never even fall down to the 1960's food production per capita. And no need to colonize Mars for that.