Yes — ISPs can detect IPTV traffic patterns using Deep Packet Inspection (DPI), flow analysis and by observing persistent HLS requests or large UDP streams. Detection does not always mean blocking, but ISPs may throttle or apply traffic shaping. To reduce detectability: use HTTPS-based HLS where available, choose providers with CDN/multi-route delivery, or use a reputable VPN that hides streaming signatures. Keep in mind that using a VPN may be restricted in some countries; check local rules and Glanfy's provider notes for region advice.