Pluto TV updates its backend infrastructure frequently. When they do this, they often change the channel IDs or the base URL structure required to access the streams. An M3U file contains static links; if the link changes on the server side, your file becomes obsolete instantly.
TiviMate users have a unique advantage. If you use the inside TiviMate, you should also adjust the buffer settings. pluto tv iptv m3u playlist fix
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