Whether or not degrowth can be made to work, what this guy is talking about is fantasy. For example:

...That creates some pressure on planetary boundaries. So that means that the Global North needs to consciously degrow because it is over-developing, and has excessive production and consumption.

This will not help. Emissions from the US and Europe now account of about 20% of global emissions and are going down. Emissions from the rest of the world are rising steeply.