The first part of the video is very good, it highlights the complexity of the issue and the problem with simplistic statements that do not consider all factors.

Yet, it is also clear that the author wants to use his own assumptions to fit his agenda. While the experiment with the beetles and the CO2 enriched plants clearly showed a potentially unexpected consequence, that the beetles enjoyed the lush growth and became more of a pest, this also suggests that in the presence of a chemical or biological or even genetic counter to control the beetles, we would indeed enjoy lusher plant growth with that particular species.

In this case the enriched CO2 can have a range of influence dependent on the pests and the counter measures. A good debunking of simplistic CO2 is all good allegations, but also another example of how enrichment always has to be bad.

Every greenhouse crop everywhere employs active management to elevate the CO2 or counteract its depletion to improve plant growth. This is a fact.