Use the "Filter Builder." Create a rule: Keep IF Country = UK OR Category = Sports . Or, even simpler, use the "Whitelist" tool to type in the exact 40 channel names you want. IPTVEditor 40 will output a "Lite" playlist with zero bloat.
Has anyone found a workaround, or is it better to move to a local runner like Dispatcharr for more stability? If you’d like me to , let me know: iptveditor 40