NVIDIA's client ships from their own flatpak repo (com.nvidia.geforcenow), which default-flatpaks can't add alongside Flathub — so a stamped oneshot service installs it on first boot with retries. Docs note the BC-250 has no hardware video decode: streams are CPU-decoded, keep to 1080p. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>