Are you building this as a standalone web tool or a plugin for an existing IPTV player?
The IPTV M3U playlist has several features that make it popular among users:
Automatically follow 301/302 redirects to update old 2021 links to their current 2024–2026 endpoints. Duplicate Removal: Playlist Editor
Apps like TiviMate (2024 version) support M3U with cloud sync, scheduled recordings, and multi-playlist management. Stalker Portal (MAC-based) and WebDAV integrations also gained traction.