For the truly DIY user: or Plex allow you to create your own M3U playlists from your personal media collection (ripped from DVDs/Blu-rays you own). That is the only reliable, legal, long-term solution.
Understanding why this is technically impossible helps clarify the limitations of public playlists: 1. Advanced Digital Rights Management (DRM) netflix m3u file github
GitHub hosts legitimate projects, like the iptv-org repository, which aggregates thousands of free, legally available over-the-air channels from around the world. For the truly DIY user: or Plex allow