OTT / Media Streaming Technology in France

Hello, I am interested in OTT / Media Streaming in France, what technology do businesses use to deliver content to their users?
What do they use as a CDN? What third-party technologies do they use? Do they have multicast? Do they use their own servers? Do they host their content or use a public cloud or streaming provider? What interfaces do they offer and what devices do they connect to?

Any type of information you could provide me would be helpful. Articles, vlogs, blogs, PDF documents, etc. French OTT / CDN systems only interest me. Thank you.

I am new here, so maybe this topic is not sitting as it should, so I apologize.