Summary of the video: speaking better English that the US President can manage, Macron invites US climate scientists to come and work in France. We will support your research financially and develop new industries to put your findings into practice. Ben Franklin, nous voilà!
A strong message on the importance of countering climamtic change. And apart from that, shrewd domestic political positioning . The French have a self-image of being dedicated to rational arguments supported by a passion for liberty. Macron plays this theme beautifully here. And they like it when their Presidents shake up the outside world, especially the Anglo-Saxonsphere. Previous French Presidents have on occasion had to hunt round for issues to be a bit contrarian towards the USA for example. Macron has no need whatsoever to dredge up anti-American policies - the President of the USA is doing that anti-US job for him free of charge.
Macron's invitation to 'you guys' in the USA