I've been running Libreelec on a Pi for years (first Pi 3, then Pi 4) and I'm quite hapy with it. It needs some regular care and setup effort to work though...

I've been running Libreelec on a Pi for years (first Pi 3, then Pi 4) and I'm quite hapy with it. It needs some regular care and setup effort to work though... CastagnaITs Netflix Plugin works well, but you'll lose the official Interface, if that's important to you. You might need to set up a key file (see the github repo). The default Youtube App needs an API key but it works. It's possible to stream Videos directly to the box from Kore on Android. Idk how this works and I'd love to know a way to do this from my Linux notebook, but I haven't had time to figure that out yet. An alternative might be running a full Raspberry OS and e.g. stream movies from your desktop via samba or NFS.