Getting Smart IPTV running on a Samsung TV took me less time than making coffee, once I understood the steps. The app itself is just a player: it ships with no channels, and you load your own playlist. On newer Tizen sets you search the Smart Hub app store for Smart IPTV, install it, and note the MAC address shown on screen.
Then comes the part most guides rush past. You upload your M3U playlist on the app maker's portal at https://siptv.app/ tied to that MAC, restart the app, and your channels appear. My first upload failed because I pasted a shortened URL; pasting the full M3U link fixed it instantly. Some background reading on https://en.wikipedia.org/wiki/IPTV helped me understand how these streams differ from cable, which set my expectations on buffering.
Since lineups and sports rights vary by country, I cross-checked the Australian side against this Australian IPTV setup guide before locking in my playlist. One honest caveat: Smart IPTV is a paid app after a short trial, so budget for the one-time activation fee. Pick a playlist provider with an EPG, and the Samsung guide view feels surprisingly close to broadcast TV.