Avoid opening M3U links directly in a web browser. Use software designed for IPTV:
A typical M3U entry looks like:
An M3U playlist functions as a digital index where each entry represents a specific channel's stream URL. Russian-specific playlists are tailored to include high-demand networks such as HBO, DAZN, and international sports coverage with localized Russian audio or subtitles. iptv m3u playlist russia link
The short answer: