I think an unsung hero in making open source broadly known and adopted in France is Framasoft [https://framasoft.org/en/], a non-profit association. They have since many many years an initiative to de-google internet and provide free and hosted alternatives and resources.
+1 on this, they had an amazing presence in the French community for 20 years and many of us own them our passion for FOSS.
More people on HN seem to know of PeerTube than know of FramaSoft, the group that's building PeerTube