Please read me again. The problem is not the jellyfin server 😉

As a said to another user : I can assure you that i spent a lot of time and effort to make it works and this solution wasn't invented by me. 😆

So, basically, the problem exist and this is a solution.

Maybe not the same version of chromcast ? I can assure you that i spent a lot of time and effort to make it works and this solution wasn't invented by me. 😆

So, basically, the problem exist and this is a solution.

OK, i know how to. But it's a difficult one as english is not my first language.

Chromecast has some internal security. One of them require to have a valid HTTPS certificat on the website (your self hosted jellyfin instance) plus be able to resolving the DNS of the website (your self .....) through the DNS on Google.

Have fun....

The solution is to buy a domain, customizing the DNS to your internal ip (192.168.x.y). AND using a revers proxy like traefik to setup a certificat with let's encrypt.

It's hard but i made it so you will be able to do it too.

Edit : for more precision, i'm speaking about a situation meet and resolved few months ago.

I can't make any assumptions about the situation today with the latest dev in the jellyfin app, let alone with the possible differences between the google play version and fdroid.