You've noticed that some IPTV reseller providers use RTSP streams while others use HLS—and here's the pattern I've observed across dozens of British IPTV resale operations: the protocol choice significantly affects customer experience, but most resellers never ask about it. HLS (HTTP Live Streaming) is more compatible (works on more devices, handles adaptive bitrate well, passes through most firewalls) but has higher latency (typically 20-40 seconds behind live). RTSP (Real Time Streaming Protocol) has lower latency (5-15 seconds) but is less compatible (blocked by some corporate firewalls, not supported by all apps, requires specific port forwarding). What actually works is asking your provider which protocol they use and understanding the trade-offs. For sports customers who need low latency (betting, social media, avoiding spoilers), RTSP may be worth the compatibility trade-offs. For general entertainment customers who prioritize reliability, HLS is usually better. Also, some providers offer both—you can choose based on customer needs. Never assume one protocol is universally "better"—the right choice depends on your customers' priorities. Let me give you a real-world example: a IPTV reseller panel operator named Nora switched from an HLS provider (35-second delay) to an RTSP provider (12-second delay) after her sports-betting customers complained about spoilers. Her entertainment-only customers, however, complained about occasional buffering with RTSP. Nora ended up using both protocols—HLS for entertainment customers, RTSP for sports customers—by creating separate playlists. The pattern that keeps showing up across protocol-savvy British IPTV operations is that successful resellers understand that protocol choice is a customer segmentation tool—different customers have different latency tolerance, and offering both (if your provider supports it) allows you to serve both segments optimally. Honestly, the most common protocol mistake is assuming that lower latency is always better—for customers who don't need real-time (movies, news, entertainment), the compatibility and stability of HLS often outweigh the latency benefits of RTSP. One more observation from years in this space: the British IPTV reseller operators who survive past three years all understand their provider's protocol and offer guidance to customers based on their priorities—they've learned that a sports bettor and a movie watcher have different protocol needs, and serving both from the same stream frustrates someone. Build protocol awareness into your customer segmentation, and you'll match the right protocol to the right customer.