I have subscribed a plan on King365tv (French provider) and it only allows 1 stream. Is it possible via a software that I would host on my server (Tvheaded?) to share the streams to other device at the same time and bypass the limitation? Any other solution possible? Thanks
Same channel? Yes. That would be easy just set up a broadcast using obs, different channels? No the service is 1 connection and each channel counts as a connection.
Your provider does not prevent you from using the service on multiple devices at the same time. But you will find that channels will keep restarting (buffering). If you can put up with that, you are all set.
Another solution is to switch to a provider who offers more that one connection.
Try using emby, jellyfin or tvmosaic...