IPTV glossary

Plain-English definitions for every IPTV term you'll encounter — across our reviews, install guides, and troubleshooting playbooks.

The IPTV space carries a lot of jargon — protocol names (M3U, Xtream Codes, Stalker), authentication concepts (MAC binding, MAC bans), feature terms (catch-up, anti-freeze, multi-screen), and technical acronyms (EPG, XMLTV, FHD, VOD). This glossary collects the terms most likely to come up when reading our reviews or following an install guide, with definitions written in plain English rather than technical shorthand. Where terms link to deeper coverage, we point you to the relevant guide.

If you spot a term we should add, the editorial team is reachable through the contact page — corrections and additions are usually published within 48 hours.

M3U: A plaintext playlist file format (extension .m3u or .m3u8) that lists IPTV stream URLs alongside channel names, group titles, and logos. The most common way IPTV providers deliver channel lists. M3U URLs are static — when the provider adds or removes channels, the URL stays the same and the IPTV app re-fetches the latest list at the configured refresh interval.
Xtream Codes: An IPTV authentication protocol that replaces a single M3U URL with a server URL plus username and password. Channels, EPG, and VOD libraries auto-update without re-importing a playlist. Most IPTV apps (TiviMate, Smarters Pro) prefer Xtream Codes credentials over M3U for this reason — they keep channel lists in sync with the provider automatically.
EPG (Electronic Program Guide): The on-screen TV guide showing what's airing now, next, and over the coming days. IPTV apps render the EPG by fetching XMLTV data from your provider (separate URL from the playlist). EPG accuracy is one of the metrics we score every IPTV service on — a 'live' provider with no working EPG is hard to actually use.
XMLTV: An XML-based file format for TV schedule data. IPTV apps fetch XMLTV from your provider to populate the EPG. Standard XMLTV fields include channel ID, programme start/stop, title, description, episode info, and category. A 7-day forward window is typical; some providers ship 14-day data.
MAG Box: Dedicated IPTV set-top box made by Infomir, with the MAG 322, 524, 540, and 524w3 being the most common models in 2026. MAG hardware is purpose-built for IPTV — it boots straight into a Stalker portal interface and uses MAC-based authentication rather than M3U URLs. Popular with users who want a TV remote-friendly experience and no Android complexity.
Stalker Portal: The authentication and channel-list system used natively by MAG boxes. Portal URL plus MAC address grants access. Stalker portals deliver channels, EPG, and VOD through a single integrated interface — slick on MAG hardware, but locked to it.
Catch-up TV: A feature that lets you watch programmes that aired in the past 24, 48, or 72 hours (sometimes longer, up to 7 days). Catch-up requires the provider to record and store live streams server-side. We benchmark catch-up windows on every provider — a 72-hour window is standard for premium services, while budget providers often skip catch-up entirely.
PPV (Pay-per-view): Premium events (UFC, boxing world title fights, WWE) sold separately from the base IPTV subscription. Some IPTV services include PPV access in standard packages — a major value differentiator if you watch combat sports. Where PPV is included it's usually one of the providers' biggest selling points and is flagged in our reviews.
MAC Address: A unique hardware identifier present on every networked device — typically formatted like 00:1A:79:XX:XX:XX. IPTV providers often bind a subscription to one MAC at sign-up, especially MAG-based services. Changing devices means contacting support to re-bind, which is a friction point worth knowing before subscribing.
MAC Ban: When an IPTV provider blocks a MAC address from authenticating, usually as anti-abuse against account sharing, VPN-driven IP hopping, or re-sale. Recovery typically requires contacting support and is not always granted. A frequent escalation step in our troubleshooting playbook for users who can no longer authenticate after travelling or switching networks.
Anti-Freeze: A server-side feature that automatically reroutes streams to backup servers when the primary feed buffers, drops, or returns errors. Anti-freeze quality varies sharply between providers — premium services typically maintain three or more backup feeds per channel; budget services rely on a single origin and freeze hard during outages.
FHD / 4K: Resolution standards used in IPTV stream advertising. FHD (Full HD) is 1920×1080. 4K (also called UHD) is 3840×2160. A provider claiming '4K available' may only stream 4K on premium sports events and a small VOD selection — we verify actual delivered resolution per channel during testing rather than trusting marketing.
VOD (Video on Demand): On-demand library of movies and TV series included alongside live channels in most IPTV subscriptions. Library size varies widely — budget services may ship 5-10K titles; premium services often advertise 70-100K+. We sample VOD libraries during testing for actual freshness (recent releases vs catalog padding) rather than headline counts alone.
Sideloading: Installing apps outside the official platform app store — standard way to install IPTV apps on Amazon Firestick using the Downloader app. Sideloading on Android TV is similarly common via APK file install. Note: sideloading on Apple TV is restricted to TestFlight or developer builds; Roku does not permit sideloading at all, which is why Roku has the thinnest IPTV app ecosystem of any major platform.
Buffering: When a stream pauses mid-playback to load more video data into memory before continuing. Causes split into four buckets: Wi-Fi signal weakness (most common), ISP traffic shaping during peak hours, IPTV server overload, and underpowered playback hardware. Our troubleshooting library covers each in detail; the fix order depends on which bucket the symptom matches.
M3U URL refresh: How often an IPTV app re-fetches the playlist from the provider's M3U URL. Default in TiviMate and Smarters Pro is once every 24 hours; can be set to manual or to higher frequencies if the provider rotates channels often. Frequent refreshing is wasteful; too-rare refreshing means missing new channels — 24 hours is a good default for most services.
Xtream UI: A specific PHP-based control panel software many IPTV providers use to manage subscriptions, generate Xtream Codes credentials, and monitor server load. Not user-facing; mentioned occasionally in support documentation. The 'Xtream Codes' credential format is named after this software lineage.
Multi-screen / multi-connection: How many simultaneous streams a single IPTV subscription supports. 1 connection (one device watching at a time) is typical for budget plans; 2-3 connections are common on premium tiers. Sharing a 1-connection account between rooms causes intermittent disconnections — known to support and a common source of complaints.
Refund policy / money-back guarantee: The window during which an IPTV provider will refund a paid subscription with no questions asked. 7 days is the most common; some premium providers offer 14 or 30. Free trials replace this for some services — we score both as part of the pricing & value axis.