Didn't watch the video but a guess would be:

Because Swedish is hard to learn and internet trolls are less likely to learn it for a small population. This removes much of the chaff that English language news receives from many different sources, resulting in much more honest news.

This means that ten or twenty years ago the Swedes were given accurate climate information and trusted the people who said it was a danger. They actioned on it by pivoting into new energy technologies like recycling and reuse.

The lack of oil industry lobbying helped preserve the trust in government and so government was trust to make the right decisions for public policy with regard to that climate information.

Swedish news media is also held to a higher standard than English language publications. All major English speaking countries having a "garbage paper" that spouts bottom feeder ideas and they are conveniently owned by one company that coordinates the fronts of the culture war.

With Germany it’s the opposite: If our economy sucks, our emissions go down. Mostly due to lower energy (fossil fuel) consumption.

Deutsche Welle (DW) on top.

Have to watch this later because of the surprising title. The current governemnt declared they would abandon some climate goals and hope that this strategy would help long term climate goals in the future, as by magic or something.

Yeah, if they where not it would be terrible. When it comes to their starting province Sweden chose easy mode.