Update README.md

README.md

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-# iptv
+# Media Stream (IPTV & Radio)
+
+Collection of publicly available IPTV & Radio channels. 
+
+Internet Protocol television (IPTV) is the delivery of television & radio content over Internet Protocol (IP) networks. 
+
+## Usage
+
+To watch IPTV you just need to paste this link `https://raw.githubusercontent.com/lambirou/iptv/master/index.m3u` to any player with support M3U-playlists.
+
+![VLC Network Panel](preview.png)
+
+Also you can instead use one of these playlists:
+
+- `https://raw.githubusercontent.com/lambirou/iptv/master/tv.m3u` (grouped by TV)
+- `https://raw.githubusercontent.com/lambirou/iptv/master/radio.m3u` (grouped by Radio)