The Vita uses older Wi-Fi standards (802.11n). Ensure you are close to your router. If you are using the Slim model (PCH-2000), the Wi-Fi antenna is slightly better than the Phat model.
Here are some troubleshooting tips if you encounter issues with PS Vita IPTV: ps vita iptv
: The gold standard for PS Vita IPTV. This homebrew app allows you to load custom .m3u8 playlists to stream live TV and YouTube videos. The Vita uses older Wi-Fi standards (802