ALLOCINE (https://www.allocine.fr) is a great (French) website to get information on Cinema.
In particular, you can use this site to find out which video on demand (VOD) platform is offering a film you would like to see.
If you don't live in France, you can subscribe to a VPN service (Nordvpn: black friday deal - usd 6.49 per month + 3 extra months) that will allow you to use these movie platforms.
