A: Technically, M3U8 is just an M3U file encoded in UTF-8. For IPTV purposes, they are identical. M3U8 files are more common for live HLS (HTTP Live Streaming) feeds.
Bad actors use "free IPTV" as bait. The M3U file itself is just text and cannot contain a virus. However: Iptv M3u Telegram Free
Several completely legal platforms offer free M3U-compatible streams without violating copyright. A: Technically, M3U8 is just an M3U file encoded in UTF-8