So it's nice to see "even 20 euros brings something". In true perfect-is-the-enemy-of-the-good style, some people argue for implausibly high levels of carbon price, which is just going to get it thrown out. I think there's a lot to be said for just having an explicit carbon tax, getting people used to it, and worrying about increasing it later1. I don't see him explicitly pointing this out, though. Notice though that the interviewer is pretty keen on getting details of the price and returns to the subject. The other nice part is that he's noticed the Skolstrejk för klimatet2 vs the "Gilets Jaunes" tension and observes - correctly - that the Sfk stuff is an opportunity: because it is, perhaps, and indication visible to pols that the public is finally willing to make some hard choices.
Less good is his equivocation about carbon tax vs trading systems. He's probably a bit stuck because he isn't allowed to say that the ETS is stupid. But he goes further than that, suggesting the possibility of introduc[ing] a separate emissions trading system for these three sectors, transport, agriculture and heat, to which my response would be FFS not another bloody boondoggle, haven't you learnt anything in all these years? He also wurbles about sector-specific targets at national level, which is also stupid.
Quasi-interesting is the role of "European obligations": We are in a completely different debate. We have European obligations, and all Member States of the European Union have these obligations. Those who fail to comply with these obligations must buy certificates from other countries, and not voluntarily, but this is simply a sanction imposed by the European level on each Member State. He doesn't talk about how binding those obligations might be, if things get tough.
1. Of course those opposed to a carbon tax are fully aware of this cunning plan, and will tell people that it is just the thin end of the wedge, but there's no point in making their job easy.
2. He - or the Googly translate - uses "Fridays for Future" but I'm guessing it is much the same.