

If you have a DRM-free stream on a mobile device, you can cast from it.
If you have a DRM-free stream on PC, you can use Sunshine (PC) and Moonlight (webOS App, manual install) to stream PC to webOS. You can use webOS Dev Manager to install on TV from PC. docs
Are there free seedboxes? If they can’t afford a VPN, they probably can’t afford a seedbox.